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Answer 1 · 2017-01-30T18:47:08

$247/20=12 7/20=12.35$

Which answer you choose depends on whether you want to use only decimals or only fractions.

If you use fractions, you must first restate the problem using only fractions.

$(-1/4+3)+(-1/5+5)-(-5/2-2 3/10)$

We can restate this, writing the mixed fraction $2 3/10$ as the improper fraction $23/10$ .

$(-1/4+3)+(-1/5+5)-(-5/2-23/10)$

Inside each of the parentheses, add or subtract the fractions.

$(11/4)+(24/5)-(-48/10)$

Get rid of the negatives by applying the principle that a negative times a negative is a positive.

$(11/4)+(24/5)+(48/10)$

Notice the greatest common denominator is $20$ because $10times2=20$ , $5times4=20$ , and $4times5=20$ . This gives

$((11times5)/(4times5))+((24times4)/(5times4))+((48times2)/(10times2))$

Or

$55/20+96/20+96/20=247/20=12 7/20=12/35$