2.Упростите выражение: 1)-1,6x*(-5y);2)-7a-9b+a=11b;3)a-(a-8)+(12+a);4)-3(c-5)+6(с+3) 3. Найдите значение выражения: (–4,16–(–2,56)) : 3,2–1,2*(-0,6)
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