2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算

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2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算
2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算

2.1×1.1×0.54÷(5.4×1.21÷5/21)简便计算
2.1 X 1.1 X 0.54 / ( 5.4 X 1.21 / 5/21 )
= 2.1 X 1.1 X 0.54 / ( 5.4 X 1.21 X 21 / 5 )
= 5 X 2.1 X 1.1 X 0.54 / 5.4 X 1.21 X 21
= 5 X 21 X 11 X 54 / 54 X 1210 X 21
= 5 X 21 X 11 X 54 / 54 X 11 X 21 X 110
= 5 / 110
= 1/22

解原式=
2.1×1.1×0.54÷5.4÷﹙1.1×1.1﹚×5/21
2.1×1.1÷1.1÷1.1×10×5.4÷5.4×5÷21
1.1×5
5.5
求采纳再细一点好吗解原式=
2.1×1.1×0.54÷5.4÷﹙1.1×1.1﹚×5/21
﹙0.1×21﹚×1.1×(0.1×5.4)÷5.4÷1.1÷1.1×5÷21
﹙0....

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解原式=
2.1×1.1×0.54÷5.4÷﹙1.1×1.1﹚×5/21
2.1×1.1÷1.1÷1.1×10×5.4÷5.4×5÷21
1.1×5
5.5
求采纳

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解原式
=(2.1×1.1×0.54)/(5.4×1.1×1.1×21/5)
=(0.21×5.4)/(5.4×1.1×21/5)
=0.21/(1.1×2×1/2×21/5)
=0.21/(2.2×21/10)
=0.21/(2.2×2.1)
=0.21/(22×0.21)
=1/22