Answers Pre-Algebra - MA3119 A Distance Learning Dividing IntegersQuestion 2

2

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Dividing Integers

Question 2 • Pre-Algebra - MA3119 A ? Distance Learning

A quality control manager is inspecting four digital scales to see if they accurately reflect a weight of 0 ounces. The table shows the weight displayed on four empty scales.Empty Scale Weight DisplaysScale 1–1 ounceScale 2–2 ouncesScale 30 ouncesScale 4–1 ounceWhat is the average error in the scale displays?

Answer

A

–4 ounces

B

–1 ounces

C

0 ounces

D

1 ounce

Explanation

Because the true weight is 0 ounces, each scale’s error is its displayed weight: −1, −2, 0, and −1 ounces. Their average is (−1 − 2 + 0 − 1) ÷ 4 = −1 ounce, so the average error is −1 ounce, choice B.

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