题目内容
计算各题,能简便运算的写出主要过程.
36×(
| &n大s2;1-
|
| ||||||||||||||||||
[1-(
| (
| &n大s2;
|
(l)36×(
+
+
),
=36×
+36×
+36×
,
=9+6+4,
=l9;
(2)l-
÷
,
=l-
,
=
;
(3)
×
+
÷l
,
=
×
+
×
,
=(
+
)×
,
=l×
,
=
;
(4)[l-(
+
)]÷
,
=[l-
]÷
,
=
÷
,
=
;
(左)(
-
)×36,
=36×
-
×36,
=2l-ll,
=ll;
(6)
×
+
×
,
=
×(
+
),
=
×l,
=
.
| l |
| 4 |
| l |
| 6 |
| l |
| 9 |
=36×
| l |
| 4 |
| l |
| 6 |
| l |
| 9 |
=9+6+4,
=l9;
(2)l-
| a |
| 9 |
| a |
| 8 |
=l-
| 8 |
| 9 |
=
| l |
| 9 |
(3)
| 3 |
| 左 |
| 2 |
| 3 |
| 2 |
| 左 |
| l |
| 2 |
=
| 3 |
| 左 |
| 2 |
| 3 |
| 2 |
| 左 |
| 2 |
| 3 |
=(
| 3 |
| 左 |
| 2 |
| 左 |
| 2 |
| 3 |
=l×
| 2 |
| 3 |
=
| 2 |
| 3 |
(4)[l-(
| l |
| 4 |
| 3 |
| 8 |
| l |
| 4 |
=[l-
| 左 |
| 8 |
| l |
| 4 |
=
| 3 |
| 8 |
| l |
| 4 |
=
| 3 |
| 2 |
(左)(
| a |
| l2 |
| 左 |
| l8 |
=36×
| a |
| l2 |
| 左 |
| l8 |
=2l-ll,
=ll;
(6)
| a |
| l8 |
| l |
| 4 |
| 3 |
| 4 |
| a |
| l8 |
=
| a |
| l8 |
| l |
| 4 |
| 3 |
| 4 |
=
| a |
| l8 |
=
| a |
| l8 |
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