题目内容
| 计算下面各题,能简便的要简便计算. 7×
|
| (
| ||||||||||||||||||||||
[1-(
| (
|
|
(1)7×
+
×
=
+
=5
;
(2)
×
÷
=
÷
=
;
(3)(
+
-
)×36
=
×36+
×36-
×36
=15+4-10
=19-10
=9;
(4)[1-(
+
)×
]÷
=[1-
×
]÷
=[1-
]÷
=
÷
=1
;
(5)(
+
)÷
-
×
=
÷
-
×
=
-
=1
;
(6)
×(26×
)
=
×
×26
=
×26
=6.
| 7 |
| 9 |
| 2 |
| 7 |
| 5 |
| 9 |
=
| 49 |
| 9 |
| 10 |
| 63 |
=5
| 38 |
| 63 |
(2)
| 5 |
| 9 |
| 2 |
| 5 |
| 2 |
| 3 |
=
| 2 |
| 9 |
| 2 |
| 3 |
=
| 1 |
| 3 |
(3)(
| 5 |
| 12 |
| 1 |
| 9 |
| 5 |
| 18 |
=
| 5 |
| 12 |
| 1 |
| 9 |
| 5 |
| 18 |
=15+4-10
=19-10
=9;
(4)[1-(
| 1 |
| 5 |
| 2 |
| 3 |
| 4 |
| 13 |
| 11 |
| 20 |
=[1-
| 13 |
| 15 |
| 4 |
| 13 |
| 11 |
| 20 |
=[1-
| 4 |
| 15 |
| 11 |
| 20 |
=
| 11 |
| 15 |
| 11 |
| 20 |
=1
| 1 |
| 3 |
(5)(
| 1 |
| 8 |
| 1 |
| 6 |
| 5 |
| 24 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 7 |
| 24 |
| 5 |
| 24 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 7 |
| 5 |
| 1 |
| 6 |
=1
| 7 |
| 30 |
(6)
| 40 |
| 13 |
| 3 |
| 40 |
=
| 40 |
| 13 |
| 3 |
| 40 |
=
| 3 |
| 13 |
=6.
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