问题:
(0.5-
2
3
)÷[(-2
3
4
)÷(2
3
15
)-(-1
1
14
)×(1
3
4
)]
(0.5-
)÷[(-2
)÷(2
)-(-1
)×(1
)]
2 |
3 |
3 |
4 |
3 |
15 |
1 |
14 |
3 |
4 |
参考答案: