ACT Math : How to subtract decimals

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #1 : How To Subtract Decimals

A runner runs 10.2 miles east, then 2.3 miles west, then 1.4 miles east.

How many miles did the runner travel from where he started? (How far east did the runner go)?

Possible Answers:

13.9 miles

6.5 miles

9.3 miles

10.2 miles

19.3 miles

Correct answer:

9.3 miles

Explanation:

When the runner is travelling east, it's in the positive direction. West is the negative direction. So we can compute it by doing the operation 10.2 + (–2.3) + 1.4 = 9.3

Example Question #42 : Decimals

What is ?

Possible Answers:

Correct answer:

Explanation:

 removed from  results in the whole integer .

Example Question #4 : Arithmetic

Subtract: 

Possible Answers:

Correct answer:

Explanation:

Rewrite  adding the correct number of placeholders and evaluate.

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