How do you simplify 6/10 + 3 3/2 - 5 1/4?

1 Answer
Leslie
Jul 28, 2016

-3/20

Explanation:

To add and subtract fractions the denominators must be the same. The lowest common denominator for 10, 2, and 4 is 20, so we must multiply each fraction by 1 in a form that will make each denominator 20. It is also helpful to make the mixed fractions into improper fractions:

6/10(2/2) + 9/2(10/10) - 21/4(5/5)

= 12/20 + 90/20 - 105/20

= 102/20 - 105/20

= -3/20

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