11第一题100*(-3)*(-5)*0.01 (九分之一减六分之一减十八分之一)*36 (四分之一减二分之一减八分之一

3个回答

  • 100×(-3)×(-5)×0.01

    =100×3×5×0.01

    =300×5×0.01

    =1500×0.01

    =15

    ﹙1/9-1/6-1/18﹚×36

    =36×﹙﹣1/9﹚+36×﹙﹣1/6﹚+36×﹙﹣1/18﹚

    =﹙﹣4﹚+﹙﹣6﹚+﹙﹣2﹚

    =﹣12

    ﹙1/4-1/2-1/8﹚×128

    =128×﹙﹣1/4﹚+128×﹙﹣1/2﹚+128×﹙﹣1/8﹚

    =﹙﹣32﹚+﹙﹣64﹚+﹙﹣16﹚

    =﹣112

    2.25×﹙﹣2.3﹚×3/25

    =﹣﹙2.25×2.3×0.12﹚

    =﹣0.621

    ﹙﹣2.1﹚×6.5×﹙﹣3/7﹚

    =21/10×13/2×3/7

    =117/20

    注:如:九分之一=1/9