脱式计算.(友情提醒:有的可以简算)

问题描述:

脱式计算.(友情提醒:有的可以简算)
4000-3456÷32×5       
3.68-3.6×0.2+0.18        48×9.9+48×0.1
(1-
3
4
1个回答 分类:数学 2014-09-24

问题解答:

我来补答
(1)4000-3456÷32×5,
=4000-108×5,
=4000-540,
=3460;
(2)3.68-3.6×0.2+0.18,
=3.68+0.18-0.72,
=3.86-0.72,
=3.14;
(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=48;
(4)(1-
3
4)÷0.25×4,
=
1

1
4×4,
=1×4,
=4;
(5)(6-6×
2
3)÷12,
=(6-4)÷12,
=2÷12,
=
1
6;
(6)2÷[
7
12+(
5
6−
5
12)],
=2÷[
7
12+(
10
12-
5
12)],
=2÷[
7
12+
5
12],
=2÷1,
=2.
 
 
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