Question

3/4+-2/5+-7/10
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Answer 1

3/4 - 2/5 -7/10 = 15-8-14/20 ( on taking lcm)
-7/20 = -0.35.

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Answer 2

Answer:

$\frac{3}{4} + - \frac{2}{5} + - \frac{7}{10}$

=================

$- \frac{7}{20}$