题目内容

脱式计算.(友情提醒:有的可以简算哦)
4000-3456÷32×5 3.68-3.6×0.2+0.18  48×9.9+48×0.1
(1-
3
4
)÷0.25×4
45×
1
4
+54×0.25+25%
2÷[
7
12
+(;
5
6
-
5
12
)].
(1)4000-3456÷32×5,
=4000-108×5,
=4000-540,
=3460;

(2)3.68-3.6×0.2+0.18,
=3.68-0.72+0.18,
=2.96+0.18,
=3.14;

(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=480;

(4)(1-
3
4
)÷0.25×4,
=
1
4
÷0.25×4,
=1×4,
=4;

(5)45×
1
4
+54×0.25+25%,
=(45+54+1)×0.25,
=100×0.25,
=25;

(6)2÷[
7
12
+(
5
6
-
5
12
)],
=2÷[
7
12
+
5
6
-
5
12
],
=2÷[
7
12
-
5
12
+
5
6
].
=2÷[
1
6
+
5
6
],
=2÷1,
=2.
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