2 1/2*(2/15-3 5/6)+1/4

Question

2 1/2*(2/15-3 5/6)+1/4

Answer 1

Вота..........................................

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Answer 2

2/15-3 5/6=4/30-3 25/30=-3 21/30=-3 7/10

2 1/2*(-3 7/10)=5/2*(-37/10)=-37/4=-9 1/4

-9 1/4+1/4=-9