问题 解答题
脱式计算.(友情提醒:有的可以简算哦)
4000-3456÷32×53.68-3.6×0.2+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
)].
答案

(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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