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3 years ago

How to add and subtract positive and negative fractions?

Chemistry

1 answer:

Lady bird [3.3K]3 years ago

4 0

Answer:

When you are adding or subtracting a negative fraction, you usually want to consider the numerator as negative. The method is just the same, except now you may need to add negative or positive numerators.

Example 1:

Find the sum.

95+(−43)

The LCM of 5 and 3 is 15 .

To add the fractions with unlike denominators, rename the fractions with a common denominator.

95=9 × 35 × 3=2715−43=−4 × 53 × 5=−2015

So,

95+(−43)=2715+(−2015)

Since the denominators are the same, add the numerators.

=27+(−20)15=715

Explanation:

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How to add and subtract positive and negative fractions? ​

How to add and subtract positive and negative fractions?