18.32-5.47-4.32 13.4-(3.4+5.2) 17.29-5.28-6.29 3.68+7.56-2.68.
问题描述:
18.32-5.47-4.32
13.4-(3.4+5.2)
17.29-5.28-6.29
3.68+7.56-2.68.
答
(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