题目内容
下面各题怎样算简便就怎样算.
|
|
2-
| ||||||||||||||||
(15-14×
|
87×
|
|
(1)
÷0.6×
=
×
×
=
;
(2)
÷9+
×
=
×
+
×
=
×(
+
)
=
;
(3)2-
÷
-
=2-
-
=2-(
+
)
=2-2
=0;
(4)(15-14×
)×
=(15-8)×
=7×
=
;
(5)87×
=(86+1)×
=86×
+
=3
;
(6)
÷[(
+
)×
]
=
÷[
×
]
=
÷
=3.
| 18 |
| 35 |
| 2 |
| 3 |
=
| 18 |
| 35 |
| 5 |
| 3 |
| 2 |
| 3 |
=
| 4 |
| 7 |
(2)
| 5 |
| 17 |
| 1 |
| 9 |
| 12 |
| 17 |
=
| 5 |
| 17 |
| 1 |
| 9 |
| 1 |
| 9 |
| 12 |
| 17 |
=
| 1 |
| 9 |
| 5 |
| 17 |
| 12 |
| 17 |
=
| 1 |
| 9 |
(3)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2
=0;
(4)(15-14×
| 4 |
| 7 |
| 8 |
| 21 |
=(15-8)×
| 8 |
| 21 |
=7×
| 8 |
| 21 |
=
| 8 |
| 3 |
(5)87×
| 3 |
| 86 |
=(86+1)×
| 3 |
| 86 |
=86×
| 3 |
| 86 |
| 3 |
| 86 |
=3
| 3 |
| 86 |
(6)
| 4 |
| 5 |
| 1 |
| 3 |
| 2 |
| 5 |
| 4 |
| 11 |
=
| 4 |
| 5 |
| 11 |
| 15 |
| 4 |
| 11 |
=
| 4 |
| 5 |
| 4 |
| 15 |
=3.
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