Integer Operations Review

Adding Integers

100

-2 + 6

4

200

-8 + -10 

-18

300

3 + (-9)

-6

400

(-9) + 20

11

500

(-58) + 6

-52

Subtracting Integers

100

17 - 9

8

200

90-45

45

300

29 - 16

13

400

56-19

37

500

125 - 28 

97

Multiplying Integers

100

7 x 5

35

200

(-8) x (-12)

96

300

(-11) x 11

-121

400

(13)(-10)

-130

500

(-33)(-2)

66

Dividing Integers

100

27/(-3)

-9

200

(-15)/(-3)

5

300

66/(-3)

-22

400

(-100)/50

-2

500

(-500)/(-10)

50

Rules (Fill in the blank)

100

When adding two integers that have the same sign, you:

add the numbers & keep their sign

200

When adding two integers with opposite signs, you:

subtract the numbers and keep the sign of the larger one

300

When multiplying and dividing integers, if both integers have the same sign, the answer is _____________.

positive

400

When multiplying and dividing integers, if both integers have different signs, the answer is _____________.

negative

500

What is a reciprocal?

The inverse of a number. If you add the number and another, the product is 1.