How do write in simplest form given -2/5+17/20−25+1720?
2 Answers
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.
-2/5xx4/4=-8/20−25×44=−820 We now have.
-8/20+17/20−820+1720 Now we just add the numerators.
rArr-8/20+17/20=(-8+17)/20=9/20⇒−820+1720=−8+1720=920
Explanation:
You can not 'directly' add or subtract counts unless the size indicators are the same.
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Make all the size indicators (denominators) the same then subtract the counts (numerators).