How do you evaluate $- \frac { 4} { 5} - ( - \frac { 7} { 10} )$ ?

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Answer 1 · 2018-03-10T22:44:37

$-1/10$

Find a common denominator, which is 10 in this case

$10/5$ = 2 (Multiply the numerator 4 by 2 to get your new fraction, which is $(4*2)/10$ )

$-8/10$ $-$ ( $-7/10$ ) ( $-7/10$ becomes positive, because subtracting a negative number give you a positive)

$-8/10$ + $7/10$

= $-1/10$

How do you evaluate - \frac { 4} { 5} - ( - \frac { 7} { 10} ) - \frac { 4} { 5} - ( - \frac { 7} { 10} )?