计算下列各题,(能简算的要简算).有些麻烦你打,答得好的我马上采纳.
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  • 11/15÷7/3+4/15×3/7

    =11/15×3/7+4/15×3/7

    =﹙11/15+4/15﹚×3/7

    =1×3/7

    =3/7,等于7分之3

    18×2/3-1/4×8/9不用简便算法算

    =12-2/9

    =11又7/9,等于11又9分之7

    [﹙1.2-2/3﹚×15/8]×﹙1÷0.5﹚

    =[1.2×15/8-2/3×15/8]×2

    =[9/4-5/4]×2

    =1×2

    =2

    1/2×5/33+1/3×5/33+1/6×5/33

    =﹙1/2+1/3+1/6﹚×5/33

    =1×5/33

    =5/33,等于33分之5

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