计算下面各题,能简算的要写出简算过程 1.8×(4.7-3.87÷0.9) 7.28-3.14+1.72-2
计算下面各题,能简算的要写出简算过程1.8×(4.7-3.87÷0.9)7.28-3.14+1.72-2.864×0.8×2.5×12.50.65×14+87×65%-6...
计算下面各题,能简算的要写出简算过程 1.8×(4.7-3.87÷0.9) 7.28-3.14+1.72-2.86 4×0.8×2.5×12.5 0.65×14+87×65%-65%
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(1)1.8×(4.7-3.87÷0.9), =1.8×(4.7-4.3), =1.8×0.4, =0.72; (2)7.28-3.14+1.72-2.86, =(7.28+1.72)-(3.14+2.86), =9-6, =3; (3)4×0.8×2.5×12.5, =(4×2.5)×(0.8×12.5), =10×10, =100; (4)0.65×14+87×65%-65%, =0.65×14+87×0.65-0.65, =0.65×(14+87-1), =0.65×100, =65. |
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