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27.3x25x0.4简便计算

25X4=|0O 25x0.4=|0 10x27.3=273 |25X8=|000,25X4=|00应记住

25×27×4 =25×4×27 =100×27 =2700

25.25x0.4 =(25+0.25)x0.4 =25x0.4+0.25x0.4 =10+0.1 =10.1 祝天天向上。

25.25x0.4 =25x0.4+0.25x0.4 =10+0.1 =10.1

=4×25×0.37 =100×0.37 =37

简便计算 4.25x0.32 =(4+1/4)*0.32 =4*0.32+1/4*0.32 =1.28+0.08 =1.36

先算2.5乘以0.4 再算7.3乘以 2.5乘以0.4的积

red

25x34 =(25x4x34)/4 =3400/4 =1700/2 =850.

=0.3×(2.5×0.4) =0.3×1 =0.3

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