题目内容
计算.
(1)
÷(
-
)
(2)[
-(
-
)]÷
(3)
×
÷(
-
)
(1)
| 1 |
| 6 |
| 2 |
| 3 |
| 3 |
| 5 |
(2)[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 15 |
(3)
| 3 |
| 10 |
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
(1)
÷(
-
),
=
÷
,
=
;
(2)[
-(
-
)]÷
,
=[
-
]÷
,
=
×
,
=
;
(3)
×
÷(
-
),
=
×
÷
,
=
×
,
=
.
| 1 |
| 6 |
| 2 |
| 3 |
| 3 |
| 5 |
=
| 1 |
| 6 |
| 1 |
| 15 |
=
| 5 |
| 2 |
(2)[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 15 |
=[
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 15 |
=
| 7 |
| 20 |
| 15 |
| 7 |
=
| 3 |
| 4 |
(3)
| 3 |
| 10 |
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 3 |
| 10 |
| 2 |
| 3 |
| 4 |
| 15 |
=
| 1 |
| 5 |
| 15 |
| 4 |
=
| 3 |
| 4 |
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