能简算的要用简便方法计算 7.6×5.3+3.7×7.6

1个回答

  • 解题思路:①根据乘法分配律,提取7.6;

    ④把8.8写作1.1×8,然后根据乘法结合律,8×0.125结合得到1,然后与1.1相乘;

    ⑤24.1×1.5写作2.41×15,然后根据乘法分配律,提取15;

    ②③⑥按照四则混合运算的顺序进行计算,即可得解.

    ①7.6×5.3+3.7×7.6

    =7.6×(5.3+3.7)

    =7.6×9

    =68.4

    ②(3.7+17×0.4)÷3.5

    =(3.7+6.8)÷3.5

    =10.5÷3.5

    =3

    ③75.36÷12-4.32×0.5

    =6.28-2.16

    =4.12

    ④8.8×0.125

    =1.1×8×0.125

    =1.1×1

    =1.1

    ⑤24.1×1.5+7.59×15

    =2.41×15+7.59×15

    =15×(2.41+7.59)

    =15×10

    =150

    ⑥6.6÷(0.68+0.42)

    =6.6÷1.1

    =6

    点评:

    本题考点: 运算定律与简便运算;小数四则混合运算.

    考点点评: 完成本题要注意分析式中数据,运用合适的简便方法计算.