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简便计算5/9%2/1+5/6竖式计算

5.6+2.7+4.5 =5.5+0.1+4.5+2.7 =10+2.8 =12.8

1、56X1.02-1.4X0.8 =56X1.02-56X0.02 =56×(1.02-0.02) =56×1 =56 2、67X4分之1+2又2分之1X3.75-4又2分之1X4分之1 =67X4分之1+4分之1X37.5-4.5X4分之1 =(67+37.5-4.5)×1/4 =100×1/4 =25

13-5.4+2.6 能简便算吗 =13+2.6-5.4 =15.6-5.4 =10.2

计算2100×50,可以将2和5对齐,用简便竖式计算。然后在积的末尾添上3个“0”。

95×125=11875 竖式: 简便用脱式: 95×125 =96×125-125 =12×8×125-125 =12000-125 =11875

350÷5=70

630÷9=70,竖式如图:

2×32×25×125×5 =(2×5)×(4×8)×25×125 =10×(4×25)×(8×125) =10×100×1000 =1000×1000 =100000

这题直接计算 1.9-1.9×(1.9-1.9) =1.9-1.9×0 =1.9

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