Решите пример под номером 1115

Question

Решите пример под номером 1115

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Answer 1

=340/567+518/567+261/378+301/378-(371/420-185/420)-(15/70+24/70)=
=(680+783+903+1036)/1134-(371-185)/420-(15+24)/70=3-31/70-39/70=2 70/70-31/70-39/70=2