SubtractingRules

1.Change problem to addition by “adding the opposite”

(+) - (+) = (+) + (-)

(-) - (-) = (-) + (+)

(+) - (-) = (+) + (+)

(-) - (+) = (-) + (-)

1. - 3 – (-5)

2. 4 – 7

3. 6 – (-9)

4. -3 - 8

Multiplying

Rules1. + times - = -2. - times + = -

3.+ times + = + 4.- times - = +

1. -9(-10)2. 4 x -45

3. 4 (30)

4. (-9)•7

Dividing

Rules1. + times - = -2. - times + = -

3.+ times + = + 4.- times - = +

1. -25 ÷ 5

2. -30 /-6

3. 24/12

4. 81 ÷ -9

Worktime Worksheet