问题 解答题
脱式计算:
[1-(
1
2
-
1
4
)]×
2
3
(
8
15
-
1
5
)÷3
答案

(1)[1-(

1
2
-
1
4
)]×
2
3

=[1-

1
4
2
3

=

3
4
×
2
3

=

1
2

(2)(

8
15
-
1
5
)÷3,

=

1
3
÷3,

=

1
9

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