How to subtract decimals

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ACT Math › How to subtract decimals

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1

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)?

9.3 miles

CORRECT

10.2 miles

0

6.5 miles

0

13.9 miles

0

19.3 miles

0

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

2

Subtract:

CORRECT

0

0

0

0

Explanation

Rewrite adding the correct number of placeholders and evaluate.

3

What is ?

CORRECT

0

0

0

0

Explanation

removed from results in the whole integer .

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