18.32-5.47-4.3213.4-(3.4+5.2)17.29-5.28-6.293.68+7.56-2.68.

1个回答

  • 解题思路:(1)(3)(4)运用加法交换律简算.

    (2)运用减法的性质简算.

    (1)18.32-5.47-4.32

    =18.32-4.32-5.47

    =14-5.47

    =8.53

    (2)13.4-(3.4+5.2)

    =13.4-3.4-5.2

    =10-5.2

    =4.8

    (3)17.29-5.28-6.29

    =17.29-6.29-5.28

    =11-5.28

    =5.72

    (4)3.68+7.56-2.68

    =3.68-2.68+7.56

    =1+7.56

    =8.56

    点评:

    本题考点: 运算定律与简便运算.

    考点点评: 此题是考查小数的四则混合运算,仔细观察算式的特点,灵活运用一些定律进行简便计算.