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2.5×1.25×32脱式计算

2.5×1.25×32 =2.5×4×1.25×8 =10×10 =100

①2.5×1.25×32 =2.5×1.25×(4×8)=(2.5×4)×(1.25×8)=10×10=100 ②51×2443+51×1943=51×(2443+1943)=51×1=51③318÷58-159×127=258×85-149×97=5-2=3④0.65×201-0.65=0.65×(201-1)=0.65×200=130

2.5×3.2×1.25 =(2.5×0.4)×(8×1.25) =10×10 =100

32×1.25脱式计算 =1.25x8x4 =10x4 =40

1

解:1.25*3.2*2.5 =1.25*(8*0.4)*2.5 =1.25*8*(0.4*2.5) =10*1 =10

脱式运算怎样做 1.25×32+2.5×12.5+0.125×430 =1.25×32+25×1.25+1.25×43 =1.25×(32+25+43) =1.25×100 =125

2.5✘1.6✘1.25 =5

1.25×32×12.5%?脱式计算 1.25×32×12.5%? =1.25*8*4*0.125 =10*0.5 =5

(1)0.25×1.25×4×8,=(0.25×4)×(1.25×8),=1×10,=10;(2)2.125×14+1.875÷4,=(2.125+1.875)×14,=4×14,=1;(3)(2.5-0.125)×0.8+6.24,=2.5×0.8-0.125×0.8+6.24,=2-0.1+6.24,=8.14,(4)2÷23-23÷2,=2×32-23×12,=3-13,=223;...

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