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____________________ Extra Challenge Unit 
Examples 
Practice Questions 
Grade 1 – Lesson 13 
Math Practice Sheets 
 
Exploring Number Patterns and Counting to 100 Part I 
 
 1 
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1. Count the objects. Then write the number and number name. 
a) b) c) d) 
 
 
 
 
 
 
 
 
 
 
 
 
 
2. Count the balloons. 
 
 There are ____ balloons. 
 
 
 
 
 
 
Look and learn the numbers. 
11 
Eleven 
12 
Twelve 
13 
Thirteen 
Exercise 
Unit 
 13.1 
 
Numbers: 11 to 14 
Example 
 
 
 
 
 
 
 
 
14 
Fourteen 
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 2 
 
 
 
 
3. Count and write the numbers. 
 
 
 
 
 
11 
 
 
 
 
 
 
 
 
 
 
12 
 
 
 
 
 
 
 
13 
 
 
 
 
 
 
14 
Exercise 
Unit 
13.1 
 
Numbers: 11 to 14 
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Look and learn the numbers. 
 
 
 
 
 
 
 
 
 
 
 
 
Unit 
13.2 
 
Numbers: 15 to 17 
 
Example 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Count the objects. Then write the number and number name. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2. How old are you? 
15 
 Fifteen 
16 
 Sixteen 
17 
 Seventeen 
 
 
 
 
 
 
a) 
b) 
Exercise 
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Unit 
13.2 
 
Numbers: 15 to 17 
 
Exercise 
 
 
 
3. Count and write the numbers. 
 
 
 
 
 
 
 15 
 
 
 
 
 
 
 
 
 
 
 
 16 
 
 
 
 
 
 
 
 17 
 
 
4. There are _____ horses. 
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Unit 
13.2 
 
Numbers: 15 to 17 
 
Exercise 
 
 
 
5. Join each butterfly to the correct number on the flower. 
 
a) A) 
 
 
 
 
 
 
b) B) 
 
 
 
 
 
 
c) C) 
 
 
 
 
 
 
d) D) 
 
 
 
 
 
 
 
e) E) 
 
 
 
 
14 
13 
16 
17 
15 
10 and 4 
10 and 7 
10 and 6 
10 and 5 
10 and 3 
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17 18 19 20 
17 18 19 20 14 15 16 17 
Look and learn the numbers. 
 
 
 
 
 
 
 
 
 
 
 
 
 17 18 19 16 
Unit 
13.3 
 
Numbers: 18 to 20 
 
Example 
Exercise 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Count the objects and circle the correct numbers. 
a) b) 
 
 
 
 
 
 
 
 
 
 
 
c) d) 
 
 
 
 
 
 
 
 
 
 
 
18 
Eighteen 
19 
Nineteen 
20 
Twenty 
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Unit 
13.3 
 
Numbers: 18 to 20 
 
Exercise 
 
 
 
 
2. Count and write the numbers. 
 
a) 
 
 
 
 
 
18 
 
 
 
 
b) 
 
 
 
 
 
 
 
19 
 
 
 
 
c) 
 
 
 
 
 
20 
 
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 8 
Unit 
13.3 
 
Numbers: 18 to 20 
 
Exercise 
 
 
 
3. Count the number of mangoes. 
 Write the number and number name. 
 
 
 
 
 
 
 
There are man goes. 
 
 
 
 
4. How many fingers do you have in your both hands and feet? 
 Count them and write the number. 
 
 
There are fingers in all. 
 
 
 
 
 
5. There are 9 birds. 
10 more birds come there. 
Draw a picture. Count all of them. 
 
 
 
 
 
 
 
 Now there are _______ birds in all. 
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Unit 
13.3 
 
Numbers: 18 to 20 
 
Exercise 
 
 
 
6. Count the objects and match with number names. 
 
a) A) 
 
 
 
 
 
 
b) B) 
 
 
 
 
 
 
 
c) C) 
 
 
 
 
 
 
d) D) 
 
 
 
 
 
 
e) E) 
 
 
 
 
 
Fifteen 
Eighteen 
 
Nineteen 
 
Sixteen 
 
Seventeen 
 
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 10 
 
 
 
 
 
 
 
 
 
 
 
 
Unit 
13.4 
 
Making Numbers 11 to 20 Part I 
 
Example 
Exercise 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Count the pictures for each of the following and write the number 
inside and outside. 
 
a) 
 
 
 
 
 
 
 
b) 
 
 
 
 
 
 
 
 
There are 15 butterflies in all. 10 are 
inside the circle. 
5 are outside the circle. 
There are ____ in all. 
___ are outside. 
___ are inside. 
There are ____ in all. 
___ are outside. 
___ are inside. 
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 11 
Exercise 
Unit 
13.4 
 
Making Numbers 11 to 20 Part I 
 
 
 
2. Write the number to show the part 11 to 20 as shown. 
 
a) b) 
 
 
 
 
 
 
 
 
 
 
c) d) 
 
 
 
 
 
 
 
 
 
 
 
 
e) f) 
 
 
 
 
 
 
 ____ and ____ 
 
____ and ____ 
 
____ and ____ 
 
____ and ____ 
 
____ and ____ 
 
8 and 7 
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 12 
John has 6 red balloons. His sister has 6 green balloons. 
How many balloons do they have in all? 
 
 
 
 
 
 
 
 
 
Example 
Exercise 
Unit 
13.5 
 
Making Numbers 11 to 20 Part II 
 
 
 
 
 
 
 
 
 and equals 
 
 
 
 
 
 
 
 
1. Write the numbers to show the parts. 
 
 
 
 
 
 
 
 
 
 
 6 and 4 _____ and _____ 
 
 10 in all _____ in all 
 
 
 
 
 
 
 
So, there are 
12 balloons in 
all. 
 
+ 
 
 
 
 
6 6 12 
 
a) b) 
 6 
 4 
4
4 
+ 
10 
 6 
 6 + 
12 
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Exercise 
Unit 
13.5 
 
Making Numbers 11 to 20 Part II 
 
 
 
 c) d) 
 
 
 
 
 
 
 
 
 
_____ and _____ _____ and _____ 
 
_____ in all _____ in all 
 
 
 
 
 
 
 
 
 
 e) 
 
 
 
 
 
 
 
 
 
_____ and _____ 
 
_____ in all 
 
 
+ 
 
 
 
 
+ 
 
 
 
 
+ 
 
 
 
 
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 14 
Example 
Exercise 
Find numbers more than or fewer than. 
 
 
 
 
 
 
 
 
 1 more than 13 is 14.1 fewer than 13 is 12.
 
 
Unit 
13.6 
 
Making Numbers 11 to 20 Part III 
 
Example 
 
 
 
 
 
 
 
 
 
 
 
1. Write the numbers that are more or fewer. 
 
a) 
 
 
 
 
b) 
 
 
 
 
 
c) 
 
 
 
d) 
 
 
 1 more than 16 is 1 fewer than 16 is 
 1 more than 11 is 1 fewer than 11 is 
 1 more than 19 is 1 fewer than 19 is 
 1 more than 17 is 1 fewer than 17 is 
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Exercise 
Unit 
13.6 
 
Making Numbers 11 to 20 Part III 
 
 
 
2. Write the numbers that are more or fewer. 
 
a) 
 
 
 
 
b) 
 
 
 
 
 
c) 
 
 
 
d) 
 
 
 
 
 
3. Write the numbers that is 1 more than 15 and 1 fewer than 17. 
 
 
 
 
 
 
 The number is ______. 
 
 
 2 more than 16 is 2 fewer than 16 is 
 2 more than 11 is 2 fewer than 11 is 
 2 more than 19 is 2 fewer than 19 is 
 2 more than 17 is 2 fewer than 17 is 
 1 more than 15 is 1 fewer than 17 is 
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Exercise 
Unit 
13.6 
 
Making Numbers 11 to 20 Part III 
 
 
 
 
 
 Solve the problems below. 
4. Regan has 12 little toy cars. 
 John has 2 fewer toy cars than Regan. 
 
 Draw the pictures to solve. 
 
 
 
 
 
 Toy cars Regan has Toy cars John has 
 
 John has _____ cars. 
 
5. Zenith has 15 pencils. 
 His sister gives him 1 more pencil. 
 
 How many pencils does Zenith have now? 
 Circle the correct answer. 
 
a) 14 b) 15 c) 16 d) 17 
6. Jerry has 11 books. 
 John has 2 more books than Jerry. 
 Jessica has 1 less book than John. 
 
a) How many books does John have? _______ 
 
 b) How many books does Jessica have? _______ 
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 17 
Look and learn the number pattern. 
 
 
 
 
 
 
 
 
 
 
Exercise 
Example 
Unit 
13.7 
 
Skip Count by Ten 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Count by 10s and write the number. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
a) 
 
 
 
 
 
_____ tens _____ 
 
 
 
 
 
 
 
 
 
 
 
 
 
b) 
 
 
 
 
 
_____ tens _____ 
 
 
 
 
 
 
 
 
 
 
 
 
 
c) 
 
 
 
 
 
_____ tens _____ 
 
 
 
 
 
d) 
 
 
 
 
 
_____ tens _____ 
 
 
 
 
 
8 
tens 
80 
Ten 
9 
tens 
90 
Ten 
10 
tens 
100 
Ten 
7 
tens 
70 
1 
ten 
10 
2 
tens 
20 
3 
tens 
30 
4 
tens 
40 
5 
tens 
50 
6 
tens 
60 
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Exercise 
Unit 
13.7 
 
Skip Count by Ten 
 
 
 
 
2. Count by 10s to complete the patterns. 
 
a) 10, _____, _____, 40 
 
 
b) 30, _____, _____, _____, _____ 
 
 
c) _____, _____, _____, _____, 100 
 
 
d) _____, _____, _____, _____, _____, _____, _____, 80 
 
 
3. Hilda has 6 cartons of noodles. 
Each carton holds 10 noodles. 
 
There are _____ noodles. 
 
How many noodles does she have in all? 
Write the number. _______ 
4. Draw 30 in groups of 10s. 
 
 
 
 
 
 
 
 
 
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 19 
Unit 
13.8 
 
Math Challenges 
Exercise 
 
 
 
 
1. Count the objects and write the number you find. 
 
a) b) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2. Join the dots from 10 to 20 and color the picture. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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10 and 8 is 
 
____ and 4 is 
14 
10 and 9 is 
 
10 and 2 is 
 
____ and 1 is 
11 
8 16 4 12 20 
10 and 6 is 
 
 
20 
 
19 
 
 
Unit 
13.8 
 
Math Challenges 
Exercise 
 
 
 
 
3. Write the missing numbers in the boxes. 
 
 
 
 
 
 
4. Find the missing numbers. 
 
a) b) c) 
 
 
 
 
 
 
d) e) f) 
 
 
 
 
 
 
 
5. Write the missing numbers (skip count by 2). 
 
 
 
 
 
 
6. Write the number from 20 to 10 in backwards. 
 
 
 
 
 10 12 14 16 18 20 
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Unit 
13.8 
 
Math Challenges 
Exercise 
 
11 
 
Fourteen 
18 
 
 
 
 
7. Write the missing number on each step. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8. Match the following. 
 
a) A) 
 
 
 
 
 
b) B) 
 
 
 
 
 
 
 
c) C) 
 
10 
15 
20 
18 
12 
19 
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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 
 Unit 14.1 Counting on a Chart 
 Unit 14.2 Skip Counting 
 Unit 14.3 Odd and Even Numbers 
 Unit 14.4 Ordinal Numbers 
 Unit 14.5 Number Patterns in Tables 
 Unit 14.6 Patterns in Problem Solving 
 Unit 14.7 Math Challenges 
Lesson 15 Understanding Tens and Ones 
Lesson 16 Number Comparison and Ordering to 100 
Review 4 Review of Lesson 13, 14, 15, and 16 
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 13.1 
1. a) 12, twelve b) 11, eleven c) 14, fourteen d) 13, thirteen 
2. 14 
 
Unit 13.2 
1. a) 16, sixteen b) 15, fifteen 4. 17 
5. a) B b) D c) E d) A 
e) C 
 
Unit 13.3 
1. a) 16 b) 20 c) 18 d) 15 
3. 18, eighteen 4. 20, twenty 5. 19 
6. a) B b) C c) E d) A 
e)D 
 
Unit 13.4 
1. a) 18; 8,10 b) 17; 7,10 2. b) 10 and 9 c) 12 and 7 
d) 15 and 0 e) 16 and 4 f) 17 and 1 
 
Unit 13.5 
1. b) 6 and 5; 11 in all c) 8 and 6; 14 in all 
 
 
d) 9 and 7; 16 in all e) 16 and 4; 20 in all 
 
 
Unit 13.6 
1. a) 17,15 b) 12,10 c) 20,18 d) 18,16 
 
2. a) 18,14 b) 13,9 c) 21,17 d) 19,15 
 
3. 16,16 4. 10 5. c 
 
6. a) 13 b) 12 
 
Unit 13.7 
1. a) 5 tens, 50 b) 7 tens, 70 c) 1 ten, 10 d) 10 tens, 100 
2. a) 20,30 b) 40,50,60,70 c) 60,70,80,90 
d) 10,20,30,40,50,60,70 
3. 6 tens; 60 
 
 
Unit 13.8 
1. a) 17 b) 21 3. 11; 13; 15; 17; 19 
4. a) 18 b) 10 c) 19 d) 12 
e) 10 f) 16 
5. 6; 10; 14; 18 
8. a) B b) C c) A 
Grade 
1 
Answer Key of Lesson 13 
 
 
 
 6 
 +5_ 
 11 
 8 
 +6_ 
 14 
 9 
 +7_ 
 16 
 16 
 +4_ 
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