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4.6×1.8×0.5怎样简便计算?

4.6×1.8×0.5 =1.8×0.5×4.6 =0.9×4.6 =4.14

4.6×0.19+0.5×1.9简便运算方法如何计算 =4.6x0.19+5x0.19 =(4.6+5)x0.19 =9.6x(0.2-0.01) =9.6x0.2-9.6x0.01 =1.92-0.096 =1824

1.5-0.9=0.6

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2.5×0.8-1.8×0.5 =2.5×4×0.2-1.8×0.5 =10×0.2-0.9 =2-0.9 =1.1

4.6*95+0.5*46用简便方法计算 =4.6×(95+5) =4.6×100 =460

0.2×1.8×0.5×10 =(0.2×0.5)×(1.8×10) =0.1×18 =1.8

2.08×60 =2*60+0.08*60 =120+4.8 =124.8 ,2.5×0.6-1.8×0.5 =1.5-0.9 =0.6

2.5×0.6-1.8×0.5 =0.5x5x0.6-1.8x0.5 =(5x0.6-1.8)x0.5 运用乘法分配律 =1.2x0.5 =0.6 祝学习进步。

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