问题 解答题
灵活计算,(能简便计算的要用简便方法计算).
36×(
2
9
+
7
12

8×(36×125)
3
4
-
7
10
×
5
7
+
1
2

〔1-(
2
3
-
1
2
)〕÷
5
12
答案

(1)36×(

2
9
+
7
12

=36×

2
9
+36×
7
12

=8+21,

=29;

(2)8×(36×125)

=8×125×36,

=1000×36,

=36000;

(3)

3
4
-
7
10
×
5
7
+
1
2

=

3
4
-
1
2
+
1
2

=

3
4

〔1-(

2
3
-
1
2
)〕÷
5
12

=(1-

1
6
)÷
5
12

=

5
6
÷
5
12

=2.

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