题目内容
(
|
|
(1)
+
×
,
=
+
,
=
;
(2)
×13+
,
=
×(13+1),
=
×1,
=
;
(3)(
-
)×12,
=
×12-
×12,
=3-2,
=1;
(4)
×
×39,
=(
×39)×
,
=
×
,
=
.
| 2 |
| 5 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 2 |
| 5 |
| 1 |
| 2 |
=
| 9 |
| 10 |
(2)
| 13 |
| 14 |
| 13 |
| 14 |
=
| 13 |
| 14 |
=
| 13 |
| 14 |
=
| 13 |
| 14 |
(3)(
| 1 |
| 4 |
| 1 |
| 6 |
=
| 1 |
| 4 |
| 1 |
| 6 |
=3-2,
=1;
(4)
| 5 |
| 26 |
| 3 |
| 10 |
=(
| 5 |
| 26 |
| 3 |
| 10 |
=
| 15 |
| 2 |
| 3 |
| 10 |
=
| 9 |
| 4 |
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