Вычислите, выбирая удобный способ:
а)62-(42-28)=? д)70-(54+16)=?
б)350-(131+169)=? е)720-(320+80)=?
в)830-30-50=? ж)830-12-18=?
г)36-16-2=? з)36-18-2=?
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