题目内容
计算下列各题.
(1)
-
×
(2)
×
+
×
(3)(
+
)×(
-
)
(4)
×[1-(
+
)].
(1)
| 7 |
| 8 |
| 5 |
| 6 |
| 9 |
| 10 |
(2)
| 2 |
| 5 |
| 4 |
| 9 |
| 2 |
| 5 |
| 5 |
| 9 |
(3)(
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 2 |
| 9 |
| 19 |
(4)
| 5 |
| 7 |
| 1 |
| 4 |
| 2 |
| 5 |
(1)
-
×
,
=
-
,
=
;
(2)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(3)(
+
)×(
-
),
=
×
,
=
;
(4)
×[1-(
+
)],
=
×[1-
],
=
×
,
=
.
| 7 |
| 8 |
| 5 |
| 6 |
| 9 |
| 10 |
=
| 7 |
| 8 |
| 3 |
| 4 |
=
| 1 |
| 8 |
(2)
| 2 |
| 5 |
| 4 |
| 9 |
| 2 |
| 5 |
| 5 |
| 9 |
=
| 2 |
| 5 |
| 4 |
| 9 |
| 5 |
| 9 |
=
| 2 |
| 5 |
=
| 2 |
| 5 |
(3)(
| 2 |
| 3 |
| 1 |
| 8 |
| 1 |
| 2 |
| 9 |
| 19 |
=
| 19 |
| 24 |
| 1 |
| 38 |
=
| 1 |
| 48 |
(4)
| 5 |
| 7 |
| 1 |
| 4 |
| 2 |
| 5 |
=
| 5 |
| 7 |
| 13 |
| 20 |
=
| 5 |
| 7 |
| 7 |
| 20 |
=
| 1 |
| 4 |
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