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2.3x12,怎么用竖式计算

2.3x12=27.6 竖式如下:

2.3x12=27.6 2.3 _×_1 2__ 4 6 __23___ 27.6

2.5乘3.2乘12.5等于2.5乘0.4乘8乘12.5,等于,1乘1等于1。

2.5×3.2×12.5 =2.5×4×0.8×12.5 =10×10 =100

3.2 X 12.5 = 320 X 0.125 = 40 X 8 X 1/8 = 40

2/3*12+3/4*12-1/2*12=11

3/5x5/12÷3/2= =1/4x2/3 =1/6 8÷2/5x1/4 =8x5/2x1/4 =20x1/4 =5 (1/3-1/4)x12 =1/3x12-1/4x12 =4-3 =1

3.2x12.5x7x2.5 =4x0.8x12.5x2.5x7 =4x2.5x0.8x12.5x7 =10x10x7 =700

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