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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

(1)1.8×5.46+1.8×4.54,=1.8×(5.46+4.54),=1.8×10,=18;(2)0.65×201,=0.65×(200+1),=0.65×200+0.65,=130+0.65,=130.65;(3)2.33×0.5×4,=2.33×(0.5×4),=2.33×2,=4.66;(4)99×5.6,=(100-1)×5.6,=100×5.6-5.6,=560-5....

1.8✘(100+5)=1.8✘100+1.8✘5=180+90=270

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

“4/5×1.8-0.8×80% 可以简便计算吗?可以的话写出过程” 解:原式=4/5*1.8-0.8*4/5 =4/5*(1.8-0.8) =4/5*1 =4/5 “天天以每分钟步行60米的速度从家到姥姥家,需要12分钟。如果天天的步行速度提高20%,那么从家到姥姥家需要多少分钟?(写过程和...

2.5×0.8-1.8×0.5 =5×0.8×0.5-1.8×0.5 =4×0.5-1.8×0.5 =(4-1.8)×0.5 =2.2×0.5 =1.1×2×0.5 =1.1×1 =1.1

(1)1.8×5.46+1.8×4.54,=1.8×(5.46+4.54),=1.8×10,=18;(2)0.65×201,=0.65×(200+1),=0.65×200+0.65,=130+0.65,=130.65;(3)2.33×0.5×4,=2.33×(0.5×4),=2.33×2,=4.66;(4)99×5.6,=(100-1)×5.6,=100×5.6-5.6,=560-5.6...

0.074*1.8*20.5 =0.074*(1.8*20.5) =0.074*36.9 =2.7306

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