ACT Math : How to subtract decimals

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #1 : Fluently Add, Subtract, Multiply, And Divide Multi Digit Decimals: Ccss.Math.Content.6.Ns.B.3

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:

10.2 miles

19.3 miles

9.3 miles

6.5 miles

13.9 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 #1 : Arithmetic

What is ?

Possible Answers:

Correct answer:

Explanation:

 removed from  results in the whole integer .

Example Question #1371 : Act Math

Subtract: 

Possible Answers:

Correct answer:

Explanation:

Rewrite  adding the correct number of placeholders and evaluate.

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