4.5×0.8—1.5×0.6
脱式计算下面各题(1)0.125×9.3×0.8;(2)9.83×1.5+1.5×0.17;(3)(12+23.1÷0.75)×0.4;(4)2.8×10.1;(5)[1...
脱式计算下面各题 (1)0.125×9.3×0.8; (2)9.83×1.5+1.5×0.17; (3)(12+23.1÷0.75)×0.4; (4)2.8×10.1; (5)[18.8-(4.5+2.7)]÷5; (6)50-13.5-6.5.
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(1)0.125×9.3×0.8, =0.125×0.8×9.3, =0.1×9.3, =0.93; (2)9.83×1.5+1.5×0.17, =(9.83+0.17)×1.5, =10×1.5, =15; (3)(12+23.1÷0.75)×0.4, =(12+30.8)×0.4, =42.8×0.4, =17.12; (4)2.8×10.1, =2.8×(10+0.1), =2.8×10+2.8×0.1, =28+0.28, =28.28; (5)[18.8-(4.5+2.7)]÷5, =[18.8-7.2]÷5, =11.6÷5, =2.32; (6)50-13.5-6.5, =50-(13.5+6.5), =50-20, =30.
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