题目内容
怎样简便怎样算.
|
|
|
(1)
×
×
,
=
×
,
=
;
(2)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)
×85,
=
×(86-1),
=
×86-
×1,
=3-
,
=2
.
| 5 |
| 12 |
| 7 |
| 25 |
| 3 |
| 14 |
=
| 7 |
| 60 |
| 3 |
| 14 |
=
| 1 |
| 40 |
(2)
| 5 |
| 6 |
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=(
| 1 |
| 4 |
| 3 |
| 4 |
| 5 |
| 6 |
=1×
| 5 |
| 6 |
=
| 5 |
| 6 |
(3)
| 3 |
| 86 |
=
| 3 |
| 86 |
=
| 3 |
| 86 |
| 3 |
| 86 |
=3-
| 3 |
| 86 |
=2
| 83 |
| 86 |
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