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x10.1

=6.9×10+6.9×0.1 =69.69

原式 =13x(10+0.1) =13x10+13x0.1 =130+1.3 =131.3

=2.9×(10+0.1)=29+0.29=29.29

73x10.1+27x10.1 =10.1x(73+27) =10.1x100 =1010 2.8x3.6+1.4x2.8 =2.8x(3.6+1.4) =2.8x5 =14

2.4x10.1怎样简算 =2.4x(10+0.1) =2.4x10+2.4x0.1 =24+0.24 =24.24

0.89 10 0.89 0.1

1.1X10.1一1.1 =1.1X(10.1-1) =1.1X9.1 =(1+0.1)X9.1 =1X9.1+0.1X9.1 =9.1+0.91 =10.01

(101x10.1-10.1)x1. 1怎么计算 (101x10.1-10.1)x1. 1 =10.1*(101-1)*1.1 =10.1*100*1.1 =1111

我发现10和0.1差了100倍!

10·01x10·1-1·001 =1.001X(101-1) =1.001X100 =100.1

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