脱式计算:能简算的要简算 100-36.6-63.4 0.25×13.7×0.4 32.7×28+7.3×28 1.83+85+98.17+15
脱式计算:能简算的要简算100-36.6-63.40.25×13.7×0.432.7×28+7.3×281.83+85+98.17+150.98×1056.15×9.4-...
脱式计算:能简算的要简算 100-36.6-63.4 0.25×13.7×0.4 32.7×28+7.3×28 1.83+85+98.17+15 0.98×105 6.15×9.4-42.
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(1)100-36.6-63.4 =100-(36.6+63.4) =100-100 =0 (2)0.25×13.7×0.4 =0.25×0.4×13.7 =0.1×13.7 =1.37 (3)32.7×28+7.3×28 =(32.7+7.3)×28 =40×28 =1120 (4)1.83+85+98.17+15 =(1.83+98.17)+(85+15) =100+100 =200 (5)0.98×105 =0.98×(100+5) =0.98×100+0.98×5 =98+4.9 =102.9 (6)6.15×9.4-42 =57.81-42 =15.81 |
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