7th Grade Go Math Unit 1 Test Review

-10 + -5

• -5

• 5

• 15

• -15

Answer explanation

when adding with same sign you keep the sign and add

9 + (-20)

• 11

• -11

• 29

• -29

Answer explanation

When adding with different signs you keep the sign of the greater and subtract bigger - smaller

-13 + 32

• 19

• -19

• 25

• -25

Answer explanation

when adding with different signs you keep the sign of the greater and subtract bigger - smaller

-12 - 5

• 17

• 7

• -17

• -7

Answer explanation

Keep change change and then same sign.

25 - (-4)

• -29

• -21

• 21

• 29

Answer explanation

Keep change change and then same sign

-3 - (-40)

• 43

• -43

• 37

• -37

Answer explanation

keep change change and then different sign

Antoine has $13 in his checking account. He buys some school supplies and ends up with $5 in his account. What was the overall change in Antoine's account.

• 8

• -8

• 18

• -18

Answer explanation

overall change is later event - earlier event. so 5 - 13 = -8.

- 9 x (-5)

• -45

• 54

• 45

• -54

Answer explanation

when multiplying if there is an even amount of negatives it is positive

0 x -10

• 10

• 0

• -0

• -10

Answer explanation

zero is neither negative nor positive

12 x (-4)

• -48

• 48

• 3

• -3

Answer explanation

when multiplying and there is an odd amount of negatives the answer is negative