问题 解答题
计算(能简便的要简便)
40÷[(
3
4
-
1
3
)×3]
85×0.75+15×75%
9
10
÷[
2
5
+(1-
10
11
)]
7.85-1.89-2.11+2.15
[1-(
1
2
+
1
6
)]÷
1
3

24×(
1
4
+
1
8
-
1
6
答案

(1)40÷[(

3
4
-
1
3
)×3]

=40÷[

5
12
×3],

=40÷

5
4

=32;

(2)85×0.75+15×75%

=85×0.75+15×0.75,

=(85+15)×0.75,

=100×0.75,

=75;

(3)

9
10
÷[
2
5
+(1-
10
11
)]

=

9
10
÷[
2
5
+
1
11
],

=

9
10
÷
27
55

=

11
6

(4)7.85-1.89-2.11+2.15

=7.85+2.15-(1.89+2.11),

=10-4,

=6;

(5)[1-(

1
2
+
1
6
)]÷
1
3

=[1-

2
3
]÷
1
3

=

1
3
÷
1
3

=1;

(6)24×(

1
4
+
1
8
-
1
6

=24×

1
4
+24×
1
8
-24×
1
6

=6+3-4,

=5.

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