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76×1.9+7.6×81的简便算法

76×1.9+7.6×81的简便算法 76×1.9+7.6×81 =7.6*19+7.6*81 =7.6*(19+81) =7.6*100 =760

9.6-7.6×1.1 =9.6-7.6x(1十0.1) =9.6-7.6-0.76 =2-0.76 =1.24

9/8-1/7+1/8-6/7=(9/8+1/8)-(1/7+6/7)=10/8-1=5/4-1=1/4。 使用结合律。

解:根据提取公因式的简便方法, 原式=4/7x6/9+4/7x1/9 =4/7x(6/9+1/9) =4/7x7/9 =4/9

解:根据提取公因式的简便方法, 原式=4/7x6/9+4/7x1/9 =4/7x(6/9+1/9) =4/7x7/9 =4/9

1.44

原式 =7.6x(2-0.1)-13 =7.6x2-7.6x0.1-13 =15.2-0.76-13 =14.44-13 =1.44 供参考。

8.9×1.1+15.7×8.9+6.8×1.1 =(8.9+6.8)×1.1+15.7×8.9 =15.7×1.1+15.7×8.9 =15.7×10 =157

7.6÷5.4÷1.9×5.4 =7.6÷1.9×5.4÷5.4 =4x1 =4

7.6÷5.4÷1.9×5.4 5。4先约去 7.6÷1.9=4 希望对你有帮助O(∩_∩)O~

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