grade_level1_unit16

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____________________ Extra Challenge Unit 
Examples 
Practice Questions 
Grade 1 – Lesson 16 
Math Practice Sheets 
 
Number Comparison and Ordering to 100 
 
 1 
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Exercise 
Example 
Unit 
16.1 
 
Using 1 More, 1 Less, 10 More, 10 Less 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Use the beads to complete the following. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
34 is 10 more than 24. 
 
24 is 10 less than 34. 
34 is 1 less than 35. 
 
35 is 1 more than 34. 
 
 
 
 
 
 
 
 
 
35 
 
 
 
 
 
 
 
 
 
 34 
 
 
 
 
 
 
 
 
 
 24 
 
 
 
 
 
 
 
 
 
34 
 b) 53 a) 
26 
 c) 
75 
 d) 45 
 f) 18 e) 
 1 more than __ is __ 
 1 less than __ is __ 
 1 more than 26 is 27. 
 1 less than 26 is 25. 
 1 more than __ is __ 
 1 less than __ is __ 
 1 more than __ is __ 
 1 less than __ is __ 
 1 more than __ is __ 
 1 less than __ is __ 
 1 more than __ is __ 
 1 less than __ is __ 
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Exercise 
Unit 
16.1 
 
Using 1 More, 1 Less, 10 More, 10 Less 
 
 
 
 
2. Complete the following sentences. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 b) 
 10 more than __ is __ 
 10 less than __ is __ 
 67 
 a) 
 10 more than __ is __ 
 10 less than __ is __ 
45 
 c) 
 10 more than __ is __ 
 10 less than __ is __ 
 39 
 d) 
 10 more than __ is __ 
 10 less than __ is __ 
 56 
 f) 
 10 more than __ is __ 
 10 less than __ is __ 
 86 
 e) 
 10 more than __ is __ 
 10 less than __ is __ 
 73 
 h) 
 10 more than __ is __ 
 10 less than __ is __ 
 82 
 g) 
 10 more than __ is __ 
 10 less than __ is __ 
 79 
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Exercise 
Unit 
16.1 
 
Using 1 More, 1 Less, 10 More, 10 Less 
 
 
 
 Solve the problems below. 
 
3. Lily is 21 years old. If Tina is 10 years older than Lily, how old is Tina? 
 
Tina is _____ years old. 
 
 
4. Laura has 43 pencils. If Daniel has 1 more pencil and Daphne has 
10 less pencils than Laura, write the number of pencils that 
Daniel and Daphne have. 
 
Daniel has _____ pencils. 
 
Daphne has _____ pencils. 
 
 
 
5. Brian saves $10 more than Sam. If Sam saves $59 per month, 
how much money does Brian save per month? 
 
 
Brian saves $_____ per month. 
 
6. Write two numbers that are 10 more and 10 less from 44. 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Exercise 
Example 
Unit 
 16.2 
 
How to Make Numbers on a Hundred Chart 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Write the numbers to complete the parts of a hundred chart. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 a) 
 43 
 33 
 44 
 
 b) 
 
 76 
 87 
 96 
 c) 
 65 
 
 
 
 d) 
 
 51 
 62 
 
31 32 33 34 35 36 37 38 39 40 
41 42 43 44 45 46 47 48 49 50 
51 52 53 54 55 56 57 58 59 60 
1 more than 46 is 47. 
1 less than 46 is 45. 
 
10 more than 46 is 56. 
10 less than 46 is 36. 
 
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Exercise 
Unit 
16.2 
 
How to Make Numbers on a Hundred Chart 
 
 
 
2. By using a hundred chart complete the following. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3. Regina says ‘I am 13 years old’. If her small brother is 10 years less than 
her and her friend Ricco is 1 year old than her, how old are her brother 
and Ricco? 
 
Her small brother is ___ years old. 
 
Ricco is ___ years old. 
 
4. Which of the following number 
 fits into the box with the question 
 mark? 
 
a) 51 b) 63 c) 71 d) 62 
a) 
1 more than 45 is 46. 
1 less than 45 is ___ 
10 more than 45 is ___ 
10 less than 45 is ___ 
b) 
1 more than 19 is ___ 
1 less than 19 is ___ 
10 more than 19 is ___ 
__sssssssssssssssssssss_ 
10 less than 19 is ___ 
c) 
1 more than 81 is ___ 
1 less than 81 is ___ 
10 more than 81 is ___ 
10 less than 81 is ___ 
 ? 
 
 63 
 72 
 
 
 51 
 
d) 
1 more than 63 is ___ 
______sssssssssssss 
1 less than 63 is ___ 
10 more than 63 is ___ 
10 less than 63 is ___ 
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Exercise 
Example 
Unit 
16.3 
 
Number Comparison with ‘<’, ‘=’, or ‘>’ 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Write ‘less than’, ‘equal to’, or ‘greater than’ and use 
‘<’, ‘=’, or ‘>’ to compare the following. 
 
 
 
 
 
 
 
 
 
 
 c) 
 
 
 
 
 
 
 
 
 
 
b) 
 
 
41 is greater than 32. 
41 > 32 
64 is __________ 40. 
64 __ 40 
 
52 is greater than 45. 
 52 > 45 
 
35 is less than 42. 
 35 < 42 
d) 
__ is __________ __ 
 __ __ __ 
a) 
 
80 is __________ 60. 
 80 __ 60 
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Exercise 
Unit 
16.3 
 
Number Comparison with ‘<’, ‘=’, or ‘>’ 
 
 
 
 
2. Write the correct symbols ‘<’, ‘=’, or ‘>’ in the box. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3. Madeline has 19 crayons. Nick has 28 crayons. Who has fewer crayons? 
Use ‘>’, ‘<’, or ‘=’ to compare the number. 
 
 
 
4. Mary spends $46 per week. Peter spends more money than Mary. 
Which of the following is the amount of money that Peter spent? 
 
a) 45 b) 44 c) 50 d) 39 
 
5. Write a story to show how much money David and Laura spent in a 
week. Use the ‘<’, ‘=’, or ‘>’ to compare. 
 
 
 
 
 
 
 
b) 48 48 
c) 55 51 d) 31 13 
e) 97 99 f) 57 75 
g) 89 89 h) 21 23 
i) 49 94 j) 44 73 
28 19 
a) 39 40 < 
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Exercise 
Example 
Unit 
16.4 
 
Number Ordering with a Hundred Chart 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Write the missing numbers in the hundred chart below. 
 
1 2 3 4 5 6 7 8 9 10 
 12 13 14 15 16 18 19 20 
 21 22 24 25 26 27 28 29 30 
31 32 33 34 35 36 37 39 40 
41 42 43 44 45 47 48 49 50 
 53 54 55 56 57 58 59 60 
61 62 64 65 66 67 68 69 70 
71 72 73 74 76 77 78 79 80 
81 82 83 84 85 86 87 88 89 
91 94 95 96 97 98 99 100 
 
34 35 36 37 38 
44 45 46 47 48 
54 55 ? 57 58 
64 65 66 67 68 
74 75 76 77 78 
 
We can use the hundred chart to find missing numbers. 
In a hundred chart, 1 more than 55 is 56. 
Also, 10 more than 46 is 56. 
So, the missing number is 56. 
 
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Exercise 
Unit 
16.4 
 
Number Ordering with a Hundred Chart 
 
 
 
 
 
2. Write the missing numbers in the given part of the hundred chart 
table.Solve the problems below. 
 
3. I am a number that is between 47 and 52. Which number am I? 
 
a) 46 b) 54 
 
 c) 51 d) 56 
 
 
4. Complete the following patterns by filling in the blanks with the 
missing numbers. 
 
 
 
 
 
 
 
 
 
 
 
 
a) b) 
 66 
 
 67 
 
 69 
 
 56 57 
 
 58 
 
 
 
 
 87 
 
 89 
 
 76 
 
 78 
 
 79 
 
 77 
 
 78 
 
 
 
 80 
 
 
 
 68 
 
 69 
 
 70 
 
 97 
 
 98 
 
 99 
 
 
 87 
 
 89 
 
 90 
 
76 78 
 
86 
 
88 
 
90 
 
97 
 
100 
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Exercise 
Example 
Unit 
16.5 
 
Estimating Using a Number Line 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Write the numbers in the correct order on the number line. 
 
a) 22, 25, 29 
 
 
 
 
 
 
 
b) 58, 52, 44 
 
 
 
 
 
 
c) 67, 74, 69 
 
 
 
 
 
22 25 29 
21 30 
 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 
Numbers are in order on the number line. 
For example: 
18 on the number line above lies between 10 and 20. 
 20 is the nearest tens to 18. 
40 50 60 
65 75 70 
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Exercise 
Unit 
16.5 
 
Estimating Using a Number Line 
 
 
 
d) 90, 87, 92 
 
 
 
 
 
 
 
e) 43, 34, 47 
 
 
 
 
 
 
f) 12, 6, 19 
 
 
 
 
 
2. Bob’s house number is 35. John’s house number is 25. Sharon’s house 
number is 16. Does John live closer to Bob or Sharon? Use the number 
line to solve. 
 
 
 
 
3. Luke and Kathy’s locker numbers are 78 and 62 respectively. Sam’s 
locker number is closer to Luke’s locker. Which number is Sam’s locker 
number? 
 
a) 65 b) 66 
 
c) 61 d) 68 
 
 
 30 50 40 
20 0 10 
85 95 
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Exercise 
Example 
Unit 
16.6 
 
Learning Before, After, and Between 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Write the number that is one before. 
a) 19, 20 b) ____, 34 c) ____, 67 
2. Write the number that is one after. 
a) 43, 44 b) 17, ____ c) 88, ____ 
3. Fill in the missing numbers in the given tables. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 
In the number line above, one number comes after another. For 
example, 2 comes after 1. “2 comes after 1” is the same as saying 
“1 lies before 2”. You can use a number line to find the number 
that is one before, after, or between the given numbers. 
In the number line, 12 lies between 11 and 13. Also 12 is one 
after the 11 and 1 before than the 13. 
a) b) 
7 8 9 
 
Before 
 8 
 
 4 
 
 14 
 
 5 
 
 20 
 
0 1 2 
 
6 
9 
3 
18 
After 
29 
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Exercise 
Unit 
16.6 
 
Learning Before, After, and Between 
 
 
 
4. Write the number that is between. 
 
a) 44, 45, 46 b) 61, ___, 63 c) 75, ___, 77 
 
5. Write the missing numbers. 
 
 
 
 
 
 
 
 
 
 
 
6. Laura scored 47. Molly scored 1 more than Laura. James scored 
10 less than Molly. Write the scores of all three in order. 
 
______, ______, ______ 
 
7. What is the number between 29 and 31? Harry has that many markers. 
How many markers does Harry have? 
 
Harry has ______ markers. 
 
8. Write a problem to show the numbers one more and one less and 
between in the hundred chart below. 
 
 
 
 
 
 
 
 
 
a) 5 6 7 
 
8 
 
b) 0 3 
 
c) 6 9 
 
d) 13 16 
 
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Exercise 
Example 
Unit 
 16.7 
 
Three Numbers Ordering 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Order the numbers from least to greatest and write. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 17 22 34 
 least greatest 
a) 
 22 17 34 
 
 
 ___ ___ _____ 
 least greatest 
b) 
 47 58 49 
 
 
 ___ ___ _____ 
 least greatest 
c) 
 89 87 79 
 
 
 ___ ___ _____ 
 least greatest 
d) 
 65 47 39 
 
You can order the numbers 
from least to greatest. 
 
How can you order 
the following 
numbers? 
 
34 43
zz
z 
55 
 i.e. 34 43 55 
You can order the numbers 
from greatest to least. 
 
 i.e. 55 43 34 
 
 ___ ___ _____ 
 least greatest 
e) 
 17 71 40 
 
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Exercise 
Unit 
16.7 
 
Three Numbers Ordering 
 
 
 
2. Order the following given numbers from greatest to least. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3. Bob, Allen, and Sam have 6, 7, and 8 dollars respectively. Who has the 
most and the least money? 
 
______ has most money. ______ has least money. 
 
 
4. In a game, team A scores 3, team B scores 4, and team C scores 2. Rank 
these three teams from greatest to least score. Which team won the 
match? 
 
 
 
5. In an intelligence test of three students, Sean got 47 points, Peter got 
44 points, and Mary got the highest score. Which of the following is 
Mary’s grade? 
 
 
 
 
 
3, 1, 2 1, 2, 3 
 
8, 9, 7 
51, 50, 52 
90, 91, 89 
77, 78, 76 
97, 95, 98 
a) 
b) 
c) 
d) 
e) 
f) 
a) 47 b) 45 
c) 48 d) 44 
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Exercise 
Example 
Unit 
16.8 
 
Making an Organized List 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Look at the numbers above. Make a list to find the secret number. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
a) I am in a square. I am greater than 10 but less than 
20. Which number I am? 
 
I am 19. 
 
 
 b) I am in a rectangle. I am greater than 40 but less 
than 50. Which number am I? 
 
I am _______. 
 
 
 c) I am in a circle. I am greater than 20 but less than 
30. Which number am I? 
 
I am _______. 
 
 
 
63 
 
 
 35 
 
 42 
 
 45 
 
 50 
 
 9 
 
 61 
 
 4 
 
 19 
 
 27 
 
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Exercise 
Unit 
16.8 
 
Making an Organized List 
 
 
 
 
2. Answer the following. 
 
 Steve Bob John Craig Allan 
 
 
 
 
3. Look at the following numbers and answer the given questions. 
 
42, 68, 85, 34, 91, 77, 55, 24, 50 
 
a) My favorite number lies between 30 and 40. 
 
My favorite number is _______. 
 
b) You say my name when you count by tens. Which number 
 am I? 
I am _______. 
 
c) I am a number having the same two digits. I am more than 
 30 but less than 60. Which number am I? 
 
I am _______. 
 
 
4. Which of the following shows the numbers in order from least to 
greatest?My book is 
between 3rd book 
and 5th book. 
a) Who could I 
 be? 
 __________ 
 
b) I have 3 letters in my 
 name. Who am I? 
 __________ 
 
a) 43, 96, 44 b) 50, 46, 48 
c) 68, 74, 79 d) 4, 64, 49 
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 18 
Unit 
16.9 
 
Math Challenges 
 
Exercise 
 
 
 
 
 
1. Write appropriate sign (‘>’, ‘<’, or ‘=’). 
 
 
 
 
 
2. Complete the table. 
 
 
 
 
 
 
 
 
3. Circle the smallest number in each box. 
 
 
 
 
 
4. Cross the largest number in each box. 
 
 
 
 
 
 
 
5. Find the Missing Numbers in the following boxes. 
 
a) 87 
 
b) 78 98 
 
 c) 89 
101 102 112 106 
 79 
 
80 
 110 
 
101 99 98 98 
51 55 60 3 9 5 2 
101 105 100 102 
 a) b) 
 a) 
 b) 
a) b) 
 a) 
 
 b) 
 
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Unit 
16.9 
 
Math Challenges 
 
Exercise 
 
 
 
 
6. Complete each word Problem. 
 
a) A has 4 cows and B has 6 cows. How many more cows does B have? 
 
 B has ______ more cows than A. 
 
b) Allen and Sam have 10 and 15 dollars respectively. What is the 
difference amount of money between them? 
 
______ dollars 
 
c) In a soccer match, team A scored 5, team B scored 3, and team C 
scored 4. Which team made the highest score? 
 
 
7. Fill in the blanks. 
 
a) The number before 5 is ______. 
b) The number between 79 and 81 is ______. 
c) The number after 102 is ______. 
8. Identify whether the set of numbers below are in certain order or not. 
Write yes or no. 
 
 
 
 
 
 
 
9. Sam has 5 red crayons, 2 green crayons, and 1 blue crayon. Connor has 
4 blue crayons and 3 yellow crayons. Circle who has more crayons. 
 
 
 
Sam Conner 
a) 
b) 
68, 67, 66, 65 
50, 51, 49, 48 
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 20 
a) 10 more than 29 is _____. 
b) 10 less than 56 is _____. 
10 more than 50 is _____. 
10 less than 89 is _____. 
Unit 
16.9 
 
Math Challenges 
 
Exercise 
 
 
 
 
 
10. Count 20 backwards from the number 50, and then count 10 forward 
from the resulting number. Circle the final resulting number. 
 
 
11. Use the appropriate sign (‘=’, ‘>’, or ‘<’) between the two sets of Guinea 
Pigs below. 
 
 
 
 
 
 
Circle how many guinea pigs you need to take out of Box B to have the 
same number of guinea pigs in both boxes. 
 
 
 
12. Complete each of the following sentences. 
 
 
 
 
 
13. Use a hundred chart. Follow the directions to find the missing 
numbers. 
 
a) Start at 50 and count forward to 10 spaces. 
 
 
 
 
b) Start at 89 and count 10 spaces backward. 
 
 
 
30 50 40 
 Box A Box B 
2 4 3 
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Congratulations! 
You have finished a lesson. You should be very proud of yourself. 
Now it is time to progress to the next lesson. 
Your next assignment is notated by a green arrow. 
 
 
Lesson 1 Numbers Exploration to 12 
Lesson 2 Number Comparing and Ordering 
Lesson 3 Addition Exploration Part I 
Lesson 4 Addition Exploration Part II 
Review 1 Review of Lesson 1, 2, 3, and 4 
Lesson 5 Subtraction Exploration Part I 
Lesson 6 Subtraction Exploration Part II 
Lesson 7 Introducing Five and Ten Relationship 
Lesson 8 Learning Addition Facts up to 12 
Review 2 Review of Lesson 5, 6, 7, and 8 
Lesson 9 Learning Subtraction Facts up to 12 
Lesson 10 Introduction to Geometry Part I 
Lesson 11 Introduction to Geometry Part II 
Lesson 12 Understanding Patterns 
Review 3 Review of Lesson 9, 10, 11, and 12 
Lesson 13 Exploring Number Patterns and Counting to 100 Part I 
Lesson 14 Exploring Number Patterns and Counting to 100 Part II 
Lesson 15 Understanding Tens and Ones 
Lesson 16 Number Comparison and Ordering to 100 
Review 4 Review of Lesson 13, 14, 15, and 16 
 Unit R4.1 Exploring Number Patterns and Counting to 100 Part I 
 Unit R4.2 Exploring Number Patterns and Counting to 100 Part II 
 Unit R4.3 Understanding Tens and Ones 
 Unit R4.4 Number Comparison and Ordering to 100 
Lesson 17 Introduction to Money Counting 
Lesson 18 Counting Money 
Lesson 19 Measurement Concepts Part I 
Lesson 20 Measurement Concepts Part II 
Review 5 Review of Lesson 17, 18, 19, and 20 
Lesson 21 How to Tell Time Part I 
Lesson 22 How to Tell Time Part II 
Lesson 23 Introducing Addition Facts to 18 
Lesson 24 Introducing Subtraction Facts to 18 
Review 6 Review of Lesson 21, 22, 23, and 24 
Lesson 25 Data and Graphs Exploration 
Lesson 26 Identifying Fractions 
Lesson 27 Addition and Subtraction Using Tens and Ones 
Review of Lesson 1 to 14 
Review of Lesson 15 to 27 
 
 
 
 
 
Next 
 
 
 
 
Unit 16.1 
1. b) 1 more than 53 is 54; 1 less than 53 is 52 
c) 1 more than 75 is 76; 1 less than 75 is 74 
d) 1 more than 45 is 46; 1 less than 45 is 44 
e) 1 more than 33 is 34; 1 less than 33 is 32 
f) 1 more than 18 is 19; 1 less than 18 is 17 
2. a) 10 more than 45 is 55; 10 less than 45 is 35 
b) 10 more than 67 is 77; 10 less than 67 is 57 
c) 10 more than 39 is 49; 10 less than 39 is 29 
d) 10 more than 56 is 66; 10 less than 56 is 46 
e) 10 more than 73 is 83; 10 less than 73 is 63 
f) 10 more than 86 is 96; 10 less than 86 is 76 
g) 10 more than 79 is 89; 10 less than 79 is 69 
h) 10 more than 82 is 92; 10 less than 82 is 72 
3. 31 4. 44; 33 5. $69 
 
Unit 16.2 
1. a) b) c) d) 
 
 
2. a) 1 more than 45 is 46; 1 less than 45 is 44 
 10 more than 45 is 55; 10 less than 45 is 35 
b) 1 more than 19 is 20; 1 less than 19 is 18 
 10 more than 19 is 29; 10 less than 19 is 9 
c) 1 more than 81 is 82; 1 less than 81 is 80 
 10 more than 81 is 91; 10 less than 81 is 71 
d) 1 more than 63 is 64; 1 less than 63 is 62 
 10 more than 63 is 73; 10 less than 63 is 53 
3. 3 yrs; 14 yrs 4. d 
 
Unit 16.3 
1. a) greater than, > b) greater than, > 
c) greater than, > d) 56 is less than 65, 56<65 
2. a) < b) = c) > d) > e) < 
f) < g) = h) < i) < j) < 
3. 19 < 28, Madeline 4. c 
 
Unit 16.4 
1. 11; 17; 23; 38; 46; 51,52; 63; 75; 90; 92,93 
 
2. a) b) 
 
 
 
3. c 4. 
 
 
 
Grade 
1 
Answer Key of Lesson 16 
 
 
 
 43 
 33 
 42 44 
 53 
 
 86 
 76 
 85 87 
 96 
 
 65 
 55 
 64 66 
 75 
 
 61 
 51 
 60 62 
 71 
 
 
 
 
 
 68 
 
 
 
 
 
 
 
59 
 
 86 
 
 
 
 
 88 
 
 
 
 
 
 77 
 
 
 
 
 
 
 
 
 
 79 
 
 
 
67 
 
 
 
 
 
 
 
 
 
 
 
 
100 
 
 
 
 
 88 
 
 
 
 
 
 77 
 
 79 
 
80 
 
 87 
 
 89 
 
 
96 
 
 98 99 
 
 
 
 
 
 
Unit 16.5 
1. a) 22,25,29 b) 44,52,58 c) 67,69,74 d) 87,90,92 
e) 34,43,47 f) 6,12,19 
 
2. 
 
 Sharon 
3. d 
 
Unit 16.6 
1. b) 33 c) 66 
2. b) 18 c) 89 
3. a) b) 
 
 
 
 
 
4. b) 62 c) 76 
5. b) 1,2 c) 7,8 d) 14,15 
6. 37,47,48 7. 30 
 
 
Unit 16.7 
1. b) 47,49,58 c) 79,87,89 d) 39,47,65 e) 17,40,71 
2. b) 9,8,7 c) 52,51,50 d) 91,90,89 e) 78,77,76 
f) 98,97,95 
3. Sam; Bob 
4. Team B, Team A, Team C; Team B 5. c 
 
 
Unit 16.8 
1. b) 42 c) 27 
2. a) Craig b) Bob 
3. a) 34 b) 50 c) 554. c 
 
Unit 16.9 
1. a) < b) > 
 
2. a) b) 
 
3. a) 51 b) 2 4. a) 101 b) 105 
5. a) 77; 97 b) 88 c) 79; 99 
6. a) 2 b) 5 c) Team A 
7. a) 4 b) 80 c) 103 
8. a) yes b) no 9. Sam 
10. 40 11. <; 3 
12. a) 39 b) 46 13. a) 60 b) 79 
 15 
 
 40 
 16 25 35 
7 8 9 
 6 
 
7 
 
8 
 2 
 
3 
 
4 
 12 
 
13 
 
 14 
 3 
 
4 
 
5 
 18 
 
19 
 
20 
 20 
 
0 1 2 
 6 
 
7 
 
8 
 9 
 
10 
 
11 
 3 
 
4 
 
 5 
 18 
 
19 
 
20 
 29 
 
30 
 
31 
 20 
 
84 
 
 81 
 
83 
 
82 
 
112 
 
107 
 
108 109 
 
111 
 
 
Grade 
1 
Answer Key of Lesson 16