How to subtract decimals - ACT Math
Card 0 of 27
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)?
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)?
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
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
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Subtract: 
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adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above
Subtract: 
Subtract:
Rewrite
adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above
Subtract: 
Subtract:
Rewrite
adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above
Subtract: 
Subtract:
Rewrite
adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above
Subtract: 
Subtract:
Rewrite
adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above
Subtract: 
Subtract:
Rewrite
adding the correct number of placeholders and evaluate.

Rewrite adding the correct number of placeholders and evaluate.
Compare your answer with the correct one above
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)?
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)?
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
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
Compare your answer with the correct one above
What is
?
What is ?
removed from
results in the whole integer
.
removed from
results in the whole integer
.
Compare your answer with the correct one above