Extra Set

Grade 7 · Unit 3 · L11 · Version A · D5F1

Multiplication with negative integers

Name ________________

Date ________________

Period ________________

1.
Compute (−2) × (−4).
Answer. 8
A negative times a negative is positive: 8.
2.
Compute (−5) × (−8).
Answer. 40
A negative times a negative is positive: 40.
3.
Compute (−4) × (−2).
Answer. 8
A negative times a negative is positive: 8.
4.
Compute (−6) × (−5).
Answer. 30
A negative times a negative is positive: 30.
5.
Compute (−3) × (−2). Then Jonah needs 3 of that amount. What is the total they need?
Answer. 18
A negative times a negative is positive: 6. Then multiply by 3: 18.
6.
Compute (−7) × (−3). Then Luis needs 3 of that amount. What is the total they need?
Answer. 63
A negative times a negative is positive: 21. Then multiply by 3: 63.
7.
Compute (−2) × (−6). Then Mei needs 2 of that amount. What is the total they need?
Answer. 24
A negative times a negative is positive: 12. Then multiply by 2: 24.
8.
Compute (−4) × (−2). Then Malik needs 3 of that amount. What is the total they need?
Answer. 24
A negative times a negative is positive: 8. Then multiply by 3: 24.
9.
Compute (−8) × (−7). Then Theo needs 4 of that amount. What is the total they need?
Answer. 224
A negative times a negative is positive: 56. Then multiply by 4: 224.
10.
Compute (−7) × (−4). Then Elena needs 5 of that amount. What is the total they need?
Answer. 140
A negative times a negative is positive: 28. Then multiply by 5: 140.
11.
Think
Sam tried this problem:
Compute (−3) × (−5).
Sam wrote 30. That is not correct. What is the right answer?
Answer. 15
Sam’s answer 30 is off. A negative times a negative is positive: 15.
12.
Think
Mei tried this problem:
Compute (−6) × (−4).
Mei wrote -24. That is not correct. What is the right answer?
Answer. 24
Mei’s answer -24 is off. A negative times a negative is positive: 24.

Original extra practice. Keys are computed from the items, not guessed.

L11 · Multiplication with negative integers