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5.5除以1.25能否巧算

15=(12.5+2.5)

1.21÷5.5 =1.21÷11÷0.5 =0.11÷0.5 =0.22 你好,本题已解答,如果满意 请点右下角“采纳答案”。

=225×1/5+225×5 =225×(1/5+5) =225×26/5 =1170

除以一个数相当于乘以这个数的倒数,0.25化为分数是1/4,1/4的倒数是4 于是5.2÷0.25=5.2×4=20.8 满意请采纳,祝你学习进步!

23088

4.5x5+5.5÷0.2 =4.5x5+5.5x5 =(4.5+5.5)x5 =10x5 =50

=7×12.5 =(8-1)×12.5 =8×12.5-1×12.5 =100-12.8 =87.5

1725除以5乘2可不可以巧算? 解: 1725÷5×2 =345×2 =690

527×15÷5 =527×(15÷5) =527×3 =1581

4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48) 3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2 3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47 5.27+2.86-0.66+1.63 13.35-4.68+2.65 47.8-7.45+8.8 0.398+0...

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