Вычислите:1)11÷13×11÷15+11÷13×2÷15;2)11÷21×5÷14+17÷21×5÷14;3)22×7÷11-22×6÷11;4)12÷19×23÷15-12÷19×4÷15;5)47÷66×1÷2-25÷66×1÷2;
1) ... = 121/195+22/195 = 143/195 = 11/15
2) ... = 55/294+85/294 = 140/294 = 70/147
3) ... = 164/11-142/11 = 22/11 = 2
4) ... = 276/285-48/285 = 228/285 = 0,8
5) ... = 47/132-25/132 = 22/132 = 1/6
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