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0.45×12×0.2的脱式简便计算

解:依题意得算式, 0.45×201 =0.45×(200+1) =0.45×200+0.45

0.45X12x0.2 =(0.45x0.2)x12 =0.09x12 =1.08 0.87

0.45+0.12x0.5 =0.45+0.06 =0.51

0.45×1.6 =0.45×2×0.8 =0.9×0.8 =0.72

0.45+0.25×0.2+0.8 =0.45+0.05+0.8 =1.3 ~回答完毕~ ~

0.45x1.2x2 =0.45x2x1.2 =0.9x1.2 =9/10x12/10 =1

5.2-7.2×0.45 =5.2-3.24 =1.96

99×0.45-0.45 =(99-1)×0.45 =98×0.45 =44.1

12.45-1.96-0.8 =10.49-0.8 =9.69

1.25×0.4×0.25×810减0.45-0.5等于多少?脱式计算。 =0.4x0.25x1.

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