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Electronic Viruses
The common flu is caused by more than 600 different types of viruses. When you get the flu, your organism is weakened by the strange body called virus. You get headaches, fever, and pains all over your body. These things contribute to the malfunctioning of your organism.
It is also bad enough when computers are infected by electronic viruses. They are programs that destroy other programs and files. You contract electronic viruses when you use pirate diskettes that contain them. You first perceive you have contracted a virus when it is usually too late. On the screen of the display unit a message like this might appear: “Smile! Your files have been destroyed”. All you can do is regret not having taken the necessary precautions. Sometimes the disks demand payment of a “license fee” to the postbox in a remote country and then wreck programs and destroy files of anyone who happens to load the disks in their machines. If you are not working with backup files it may mean the end of years of work.
What is the best antibiotic to electronic viruses? There are a certain number of steps you can take to avoid contracting electronic viruses. First of all, never load your computer with a media you are uncertain about the origin. Secondly, do not let strangers use your computer. And last, try to make backup files for all you have in it.
We use numbers to talk about: 
What time is it ? 
 
 7:00 seven o’clock 7:10 seven ten 
 7:35 seven thirty-five/ twenty-five to eight 
 
a.m. = antes do meio dia 7.00 a.m. = sete horas da manhã
p.m. = após o meio dia 7.00 p.m. = dezenove horas 
PHONE NUMBER What´s your phone number ? 
 239-9877 two three nine, nine eight double seven
 area code (011) 245-0300 (zero, eleven) two four five, oh three, oh oh
 toll free (800) 256-9800 (eight hundred) two five six, nine eight double oh
DATE
 March 23rd, 1997 - March twenty-third, nineteen ninety seven
 May 21st, 1908 - May twenty-first, nineteen oh eight
CALCULATION 
 Minus ( - ) Plus ( + ) Divided by ( : ) Times ( X )
 5 + 5 = 10 five plus five is 10
 5 x 2 = 10 five times two is 10
 10 : 2 = 05 ten divided by 2 is 5
 10 x 2 = 20 ten times two is twenty
NUMBERS
CARDINAL		ORDINAL		CARDINAL		ORDINAL
	
1 one		1st first		16 sixteen		16th sixteenth
2 two		2nd second		17 seventeen	17th seventeenth
3 three		3rd third		18 eighteen		18th eighteenth
4 four		4th fourth		19 nineteen		19th nineteenth
5 five		5th fifth		20 twenty		20th twentieth
6 six		6th sixth		21 twenty-one	21st twenty-first
7 seven		7th seventh		22 twenty-two	22nd twenty-second
8 eight		8th eighth		23 twenty-three	23rd twenty-third
9 nine		9th ninth		30 thirty		30th thirtieth
10 ten		10th tenth		40 forty		40th fortieth
11 eleven		11th eleventh		50 fifty		50th fiftieth
12 twelve		12th twelfth		60 sixty		60th sixtieth
13 thirteen		13th thirteenth	 70 seventy 70th seventieth
14 fourteen		14th fourteenth	 80 eighty		80th eightieth
15 fifteen		15th fifteenth		90 ninety		90th ninetieth 
				
	
 100 (one hundred)	 100th (one hundredth)
 1,000 (one thousand) 1,000th (one thousandth)
 1,000,000 (one million)	 1,000,000th (one millionth)
Examples:
 121 = one hundred (and) twenty one
 121st = one hundred (and) twenty-first
 3,245 = three thousand two hundred (and) forty-five
 3,245th = three thousand two hundred (and) forty-fifth