Integer Operations Review

Integer Operations Review

Addition and Subtraction Tricks: Rewrite the problem

• Put the "biggest" number first (ignore positive and negative signs)

• 7 - 19 =

• -8 + 12 =

Addition and Subtraction Tricks: Tell yourself a "mommy math" story

• Positive numbers are money that you pay back or already have. Negative numbers are money that you owe or borrow

• -20 - 5 =

• I owed my mommy $20 and I borrowed $5 more. How much do I owe my mommy now?

What is the "mommy math" story?

• -15 + 6

• -10 - 18

• 7 - 14

Watch out for double negatives!

• 4 - (-5) =

• -3 - (-3) =

• -9 - (-11) =

Multiple Choice

-8 - 5

• 3

• -3

• -13

• 13

Multiple Choice

-7 - (-7)

• 0

• 14

• -14

• 7

Multiple Choice

5 - (-5)

• 0

• -10

• -0

• 10

Multiple Choice

-4 + 10

• 14

• -14

• 6

• -6

Multiple Choice

-9 + (-2)

• 11

• 7

• -7

• -11

Multiple Choice

6 + (-4)

• 2

• -2

• 10

• -10

Multiple Choice

2 - 7

• 5

• 9

• -9

• -5

Will the answer be positive or negative?

•  $-9\times4\ =\$  

•  $-36\div-6\ =$  

•  $5\times-2=$  

•  $15\div-3=$  

•  $8\times7=$  

Multiple Choice

200 ÷ -10 =

• 2
• -2
• 20
• -20

Multiple Choice

-4 x - 10 =

• 44
• -44
• 40
• -40

Multiple Choice

-7 x 8 =

• 56
• -56
• 49
• -49

Multiple Choice

-42 ÷ -6

• 7
• -7
• 6
• -6

Multiple Choice

Divide -20/10

• 10

• 2

• -2

• -10

Multiple Choice

Divide -12/-2

• 6

• -6

• 2

• -4

Multiple Choice

Multiply -3 x (-5)

• -8

• -15

• 15

• 3