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4.6x1.02的简便方法计算

4.6x1.02=4.6x(1+0.02)=4.6+(5-0.4)x0.02=4.6+0.1-0.4x0.02=4.7-0.008=4.692

解析:线进行拆分,把1.02拆分成1+0.02,然后再分别乘以6.8,得出的积相加即可.6.8x1.02=6.8x(1+0.02)(1.02拆分成1+0.02)=6.8+6.8x0.02(两个数与同一个数相乘,等于把两个加数分别同这个数相乘)=6.8+0.136(再把两个积加起来)=6.

4.6x1.02=4.692验算:4.692÷1.02=4.6

4.9*1.02=(5-0.1)*(1+0.02)=5*1+5*0.02-0.1*1-0.1*0.02=5+0.1-0.1-0.002=4.998

4.9x(1+0.02)=4.9+0.049*2=4.998

2.4x1.02=(2+0.4)*(1+0.02)=2+0.04+0.4+0.08=2.448

把10.2拆成10和0.2分别和4.6先相乘在相加.答案是46.92

=6.8x0.02+6.8x1 =1.36+6.8 =8.14

7.2X1.02 =7.2*(1+0.02) =7.2+7.2*0.02 =7.2+0.144 =7.344

6.9x1.02=(7-0.1)x1.02=7x1.02-0.1x1.02=7.14-0.102=7.038

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