How do write in simplest form given 25+1720?

2 Answers
Oct 24, 2016

920

Explanation:

To do the simplification we require the denominators of the fractions to be the same.

To make the denominator of the first fraction 20, multiply numerator/denominator by 4, equivalent to multiplying by 1.

25×44=820

We now have.

820+1720

Now we just add the numerators.

820+1720=8+1720=920

Oct 27, 2016

920

Explanation:

The structure of a fraction is:

countsize indicator −−−−−−−−−−−−−−−mathematical names numeratordenominator

You can not 'directly' add or subtract counts unless the size indicators are the same.

Multiply by 1 and you do not change the underlying value of something. However, 1 comes in many forms.

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Answering the question

Make all the size indicators (denominators) the same then subtract the counts (numerators).

[25×1]+1720 [25×44]+1720

2×45×4 +1720 820 +1720

.

17820 = 920