Page 32 - Math Course 1 (Book 1)

Multiplying Integers

Standardized Test Example

A student missed only 4 problems A student missed only 4 problems on a test, each
on a test, each worth 20 points. worth 20 points. What integer represents the
What integer represents the total total number of points lost for those questions?
number of points lost for those
questions?
Solve the Test Item
A. –5 B. –20 C. 24 D. –80 4(–20) = –80 The product is negative.

Read the Test Item
The word missed means losing points, so the loss Answer The answer is D
per problem is –20. Multiply 4 times –20 to f nd the
total number of points lost.

Your Turn!

Multiply Integers with Different Multiply Integers with the Same
Sign Sign

Find –4(12). Find –3(–8)
Answer Answer
A. –3 A. 24
B. –46 B. –24
C. 48 C. –11
D.–48 D. 23

Find 6(–2). Find –7(11)(–4)
Answer Answer
A. 12 A. 0
B. –12 B. –81
C. –3 C. 308
D.–8 D. –308

FOOTBALL A. –3 B. 6 C. –9 D. 9

A football team loses 3 yards on
each of 3 consecutive plays. Answer
Find the total yards lost.

24