Автор - lyoshakartosha

5+2/3*(-2 1/2)
2 1/5*1/3+(-3/10):4 1/2

Ответ

Автор - hhulievgmailcom
1)5+2/3×(-2 1/2)
17/3×(-2 1/2)=17/3×-5/2=-85/6=-14 1/6



2) 2 1/5×1/3+(-3/10)÷4 1/2
11/5×1/3=11/15
(-3/10)÷4 1/2=-3/10÷9/2=-3/10×2/9=-1/15
11/15+-1/15=-12/15

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