Question

(3/4 + -2/5) + - 7/10​

Answer 1

Answer:

$( \frac{3}{4} + \frac{ - 2}{5} ) + \frac{ - 7}{10} \\ = ( \frac{15 + - 8}{20} ) - \frac{7}{10} \\ \frac{7}{20} - \frac{7}{10} \\ = - \frac{7}{20}$

Answer 2

Answer:

-7/20

Step-by-step explanation:

{3/4+(-2/5)}+(-7/10)

L.C.M of 4 and 5= 20

therefore:

(15-8)

____________ + (-7/10)

20

= 7/20–7/10

now take l.c.m of 20 and 10= 20

7/20 – 7/10

(7 – 14)

_________=. –7/20

20

hence answer is -7/20

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