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### Review Chapter

### Addition subtraction Multiplication and Division of integer

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Read each of the following in words.

38

thirty-eight

-72

negative seventy-two

691

Six hundred and ninety-one

Read each of the following in words.

-745

negative hundred seven and forty-five

2813

two thousand eight hundred

and thirteen

-3254

Negative three thousand two hundred

and fifty-four

To compare numbers we use the following symbols

Seven is greater than three.

Seven eight and nine are greater than or equal to seven.

two is less than nine.

One two and seven are less than or equal to seven.

seven is equal to seven.

0, -4, -2, 5, 3

Arrange the following sets of integers in descending order.

Arrange the following sets of integers in

ascending order.

5, 3, 0, -2, -4

-4, -2, 0, 3, 5

Find the HCF of 12 and 32

The highest common factor (HCF)of 12 and 32 is 4.

Find the HCF of 12 ,32 and 18

The highest common factor (HCF)of 12 ,32 and 18 is 2.

Find the LCM of 12 and 32

The lowest common multiple (LCM)of 12 and 32 is 96.

Find the LCM of 18 ,45 and 6

The lowest common multiple (LCM)of 18 ,45 and 6 is 180.

The University of Texas at Dallas

=2

Negative one plus three is equal to two.

(2) (-6) + (-3)

=-9

Negative six plus negative three is equal to

negative nine.

=- 9

Negative twelve minus negative three is equal to

negative nine.

(4) 7 - (-2)

= 9

Seven minus negative two is equal to nine.

=-30

Negative ten times three is equal to negative thirty.

(6) 15 (-3)

=-5

Fifteen divided by negative three is equal to

negative five.

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