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3.14x102的简便计算

3.14x102 =3.14x(100+2) =3.14x100+3.14x2 =314+6.28 =320.28

3.14*102 =3.14*(100+2) =3.14*100+3.14*2 =314+6.28 =320.28

3.14x101-3.14=3.14x(101-1)=3.14x100=314

原式=(100-1)x3.14=100x3.14-1x3.14=314-3.14=310.86供参考.

3.14x5.5-3.14=3.14x(5.5-1)=3.14x4.5=14.13

5.27x102的简便算法 5.27x102 =5.27*(100+2) =5.27*100+5.27*2 =527+10.54 =537.54

直接计算即可3.14X2.6 + 1.8x7.6=8.164+9.4=17.564

0.75x102=0.75*(100+2)=0.75*100+0.75*2=75+1.5=76.5

3.14x2.5-3.14x1.5=3.14x(2.5-1.5)=3.14x(2.5-1.5)x(2.5+1.5)=3.14x1x4=12.56

3.14x14+14x7.86-14=14x(3.14+7.86-1)=14x(3.14+6.86)=14x10=140谢谢,请采纳

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