Task 3. Read the number of population in each city. Check with your partner or your teacher

City	Population
Beijing
Bombay
Budapest
Cairo
London
Madrid
Moscow
Munich
New York
Paris
Rome
Sao Paulo
Sydney
Tokyo

Task 4. Read the text about two arithmetical operations and do the exercises below it

Basic arithmetical operations. (Addition & subtraction)

In spoken English, 2 + 3 = 5 is, ‘Two plus two equals five’ or ‘Two plus three is equal to five’ or ‘Two plus three is five’ or ‘Two increased by three equals five’. This arithmetical operation is called addition. The result of this operation is called the sum. Thus, if two is added to three, the sum is five.

In spoken English, 5 – 3 = 2 is, ‘Five minus three equals two’ or ‘Five minus three is equal to two’ or ‘Five minus three is two’ or ‘Five decreased by three equals two’. This arithmetical operation is called subtraction. The result of this operation is called the difference. Thus, if three is subtracted from five, the difference is two.

Exercise 1

Read out each of the following and provide either the sum or the difference, as required.

2 + 7 =	9 + 3 =	14 + 0 =	9,217 + 23 =
1 + 7 =	10 + 4 =	15 - 1 =	11,750 + 10 =
4 + 9 =	35 + 5 =	15 + 25 =	10,001,102 - 13 =
7 + 6 =	21 - 5 =	123 + 216 =	1,200,101 - 496,336 =
4 + 10 =	93 - 33 =	111 - 61 =	5,874,238 + 32 =

Exercise 2

Use the sentences below as models and write out four questions to ask in class.

a. If eight is subtracted from ten, what is the difference?

b. If 379,252 is added to 8,148, what is their sum?

Unit 2

WHAT’S YOUR BEST FRIEND LIKE?

Vocabulary