题目内容
| 怎样算简便就怎样算: 6÷
|
| ||||||||||||
|
2-
|
分析:(1)(2)根据四则运算的计算顺序进行计算,
(3)先把除法转化为乘法,再根据乘法分配律进行计算,
(4)根据四则运算的计算顺序进行计算.据此解答.
(3)先把除法转化为乘法,再根据乘法分配律进行计算,
(4)根据四则运算的计算顺序进行计算.据此解答.
解答:解:(1)6÷
-
÷6,
=20-
,
=19
;
(2)
×
÷(
-
),
=
×
÷
,
=
;
(3)
÷9+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(4)2-
÷
-
,
=2-
-
,
=0.
| 3 |
| 10 |
| 3 |
| 10 |
=20-
| 1 |
| 20 |
=19
| 19 |
| 20 |
(2)
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 5 |
| 12 |
=
| 1 |
| 3 |
| 3 |
| 4 |
| 4 |
| 12 |
=
| 3 |
| 4 |
(3)
| 13 |
| 17 |
| 1 |
| 9 |
| 5 |
| 17 |
=
| 13 |
| 17 |
| 1 |
| 9 |
| 1 |
| 9 |
| 5 |
| 17 |
=(
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 9 |
=
| 18 |
| 17 |
| 1 |
| 9 |
=
| 2 |
| 17 |
(4)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=0.
点评:本题主要考查了学生在四则运算中灵活运用简便算法的能力,注意计算结果的准确性.
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