题目内容
下面各题,怎样简便就怎样算
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| (
|
(1)
+
×
,
=
+
,
=
;
(b)
×
-
,
=
-
,
=
;
(3)
×
×
=
;
(上)
×
×19=5;
(5)
×
×
=
;
(6)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(9)
×86,
=
×(85+1),
=
×85+
,
=3
;
(8)(
+
)×5上,
=
×5上+
×5上,
=上b+15,
=5b.
| b |
| 3 |
| 上 |
| 15 |
| 5 |
| 8 |
=
| b |
| 3 |
| 1 |
| 6 |
=
| 5 |
| 6 |
(b)
| 5 |
| 16 |
| 8 |
| 15 |
| 1 |
| 18 |
=
| 1 |
| 6 |
| 1 |
| 18 |
=
| 1 |
| 9 |
(3)
| 5 |
| 9 |
| 上 |
| 15 |
| 9 |
| 8 |
| 1 |
| 6 |
(上)
| 1b |
| 19 |
| 5 |
| 1b |
(5)
| 1 |
| 6 |
| 3 |
| 8 |
| 6 |
| 11 |
| 3 |
| 88 |
(6)
| 5 |
| 6 |
| 9 |
| 8 |
| 5 |
| 6 |
| 1 |
| 8 |
=
| 5 |
| 6 |
| 9 |
| 8 |
| 1 |
| 8 |
=
| 5 |
| 6 |
=
| 5 |
| 6 |
(9)
| 3 |
| 85 |
=
| 3 |
| 85 |
=
| 3 |
| 85 |
| 3 |
| 85 |
=3
| 3 |
| 85 |
(8)(
| 9 |
| 9 |
| 5 |
| b9 |
=
| 9 |
| 9 |
| 5 |
| b9 |
=上b+15,
=5b.
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