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2/9×0.625÷(10/3)简便运算

3.10÷4.96=0.625=5:8

-3×10×1又1/3×0.625×(-4/9)×(-8) =[(-3)×1又1/3]×[10×(-4/9)]×[]0.625×(-8)] =(-4)×(-40/9)×(-5) =-800/9

5/8×3/10+0.625×0.6+62.5%×0.1 =0.625×0.3+0.625×0.6+0.625×0.1 =0.625×(0.3+0.6+0.1) =0.625×1 =0.625

10-(25/8)×(8/5+8/3)÷(25/12-5/8) =10-(25/8)×(64/15)÷(35/24) =(210/21)-(192/21) =6/7

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