问题 解答题
计算:
(1)
3
4
×
5
6
×
4
5
-
1
2

(2)
8
9
×(1.25-
3
4
)÷
2
3
答案

(1)

3
4
×
5
6
×
4
5
-
1
2

=

5
8
×
4
5
-
1
2

=

1
2
-
1
2

=0;

(2)

8
9
×(1.25-
3
4
)÷
2
3

=

8
9
×
1
2
÷
2
3

=

4
9
×
3
2

=

2
3

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