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能简算则简算 12.45%9.62+0.37 0.83+0.9+...

20.3÷12.5 =20.3×8÷(12.5×8) =162.4÷100 =1.624 45.9÷4.5 =45.9÷(9×0.5) =45.9÷9÷0.5 =5.1÷0.5 =10.2

8.6×5.4+0.86+86×0.45 =8.6×5.4+0.86+8.6×4.5 =8.6×(5.4+4.5)+0.86 =8.6×10+0.86 =86+0.86 =86.86

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