题目内容
| 计算下面各题. (
| [
| (
|
|
(1)(
+
×6)÷
,
=(
+
)×
,
=(
+
)×
,
=
×
,
=7;
(2)[
-(
-
)]÷
,
=[
-(
-
)]×
,
=[
-
]×
,
=
×
,
=
;
(3)(
-
)÷(
+
),
=
÷(
+
),
=
×
,
=
;
(4)
÷(
+
)×
,
=
÷(
+
)×
,
=
÷
×
,
=
×
×
,
=
;
| 2 |
| 5 |
| 5 |
| 9 |
| 8 |
| 15 |
=(
| 2 |
| 5 |
| 10 |
| 3 |
| 15 |
| 8 |
=(
| 6 |
| 15 |
| 50 |
| 15 |
| 15 |
| 8 |
=
| 56 |
| 15 |
| 15 |
| 8 |
=7;
(2)[
| 1 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 25 |
=[
| 1 |
| 4 |
| 16 |
| 20 |
| 15 |
| 20 |
| 25 |
| 3 |
=[
| 1 |
| 4 |
| 1 |
| 20 |
| 25 |
| 3 |
=
| 1 |
| 5 |
| 25 |
| 3 |
=
| 5 |
| 3 |
(3)(
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 2 |
=
| 1 |
| 4 |
| 2 |
| 10 |
| 5 |
| 10 |
=
| 1 |
| 4 |
| 10 |
| 7 |
=
| 5 |
| 14 |
(4)
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 5 |
| 3 |
| 5 |
=
| 1 |
| 2 |
| 5 |
| 20 |
| 12 |
| 20 |
| 3 |
| 5 |
=
| 1 |
| 2 |
| 17 |
| 20 |
| 3 |
| 5 |
=
| 1 |
| 2 |
| 20 |
| 17 |
| 3 |
| 5 |
=
| 6 |
| 17 |
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