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.