Question

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Answer 1

Step-by-step explanation:

-3/10+5/8=-3×4/10×4+5×5/8×5

=-12/40+25/40

=12/40-25/40

=-13/25

4/15+2/-5

=4/15+2×3/-5×3

=4/15+(-6/15)

=4/15-6/15

=-2/15

(-2/15)-(-13/25)

-2/15+13/25

-2×5/15×5+13×3/25×3

-10/75+39/75

10/75-39/75

-29/75