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2.5 1.6%2.5简便计算

1.6*2.5=4*0.4*2.5=4*(0.4*2.5)=4*1=4

2.5乘1.6简便算法这样做:2.5x1.6=2.5x(4x0.4)=(2.5x4)x0.4=10x0.4=4

=(2.4+1.6)*2.5=4*2.5=10

∵2.5=10/4∴原式 =30/(10/4)+1.6*(10/4) =30/10*4+1.6*10/4 =3*4+16/4 =12+4 =16

30÷2.5+1.6*2.5=30*1/2.5+1.6*2.5/2.5=(1/2.5)*(30+1.6*2.5)=(1/2.5)*(30+10)=(1/2.5)*40=16

1.6*2.5=4*0.4*2.5=4*1=4

4*2.5*0.4=4

36÷2.5+1.6x2.5能简算吗36÷2.5+1.6x2.5=14.4+4=18.4

2.5+2.5*1.6 =2.5+2.5*4*0.4 =2.5+10*0.4 =2.5+4 =6.5

解:1.6/2.5=16/25=(4/5)*(4/5)=0.8*0.8=0.64所以,答案是0.64.

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