问题 解答题
2
3
÷1
1
2
×
7
18
14
1
7
×2
1
2
×4
1÷
9
11
-
9
11
÷1
1÷0.45×
13
20
1
2
-
1
6
+
5
12
)×36
2
1
2
×0.45×3.5
答案

(1)

2
3
÷1
1
2
×
7
18

=

4
9
×
7
18

=

14
81

(2)14

1
7
×2
1
2
×4,

=

99
7
×(
5
2
×4),

=

99
7
×10,

=

990
7

(3)1÷

9
11
-
9
11
÷1,

=

11
9
-
9
11

=

40
99

(4)1÷0.45×

13
20

=

20
9
×
13
20

=

13
9

(5)(

1
2
-
1
6
+
5
12
)×36,

=

1
2
×36-
1
6
×36+
5
12
×36,

=18-6+15,

=12+15

=27;

(6)2

1
2
×0.45×3.5,

=1.125×3.5,

=3.9375.

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