题目内容
用简便方法计算:
×
÷
÷
÷
×
÷
+
×
+(
+
)÷
.
| 5 |
| 16 |
| 6 |
| 35 |
| 7 |
| 17 |
| 1 |
| 34 |
| 5 |
| 36 |
| 15 |
| 32 |
| 5 |
| 14 |
| 4 |
| 35 |
| 2 |
| 5 |
| 2 |
| 11 |
| 11 |
| 5 |
| 9 |
| 11 |
| 5 |
| 11 |
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 8 |
| 7 |
| 10 |
考点:分数的简便计算
专题:运算定律及简算
分析:(1)根据分数乘法计算方法计算;
(2)根据分数除法计算方法计算;
(3)根据分数除法计算方法计算;
(4)先算除法再算乘法;
(5)根据乘法分配律逆运算进行计算;
(6)先算小括号内的,再算除法,最后算加法.
(2)根据分数除法计算方法计算;
(3)根据分数除法计算方法计算;
(4)先算除法再算乘法;
(5)根据乘法分配律逆运算进行计算;
(6)先算小括号内的,再算除法,最后算加法.
解答:
解:(1)
×
=
,
(2)
÷
=14,
(3)
÷
=
,
(4)
÷
×
=
×
×
=
,
(5)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
,
(6)
+(
+
)÷
=
+
×
=
+
=
.
| 5 |
| 16 |
| 6 |
| 35 |
| 3 |
| 56 |
(2)
| 7 |
| 17 |
| 1 |
| 34 |
(3)
| 5 |
| 36 |
| 15 |
| 32 |
| 8 |
| 27 |
(4)
| 5 |
| 14 |
| 4 |
| 35 |
| 2 |
| 5 |
=
| 5 |
| 14 |
| 35 |
| 4 |
| 2 |
| 5 |
=
| 5 |
| 4 |
(5)
| 2 |
| 11 |
| 11 |
| 5 |
| 9 |
| 11 |
| 5 |
| 11 |
=
| 2 |
| 11 |
| 5 |
| 11 |
| 9 |
| 11 |
| 5 |
| 11 |
=(
| 2 |
| 11 |
| 9 |
| 11 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(6)
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 8 |
| 7 |
| 10 |
=
| 3 |
| 4 |
| 5 |
| 8 |
| 10 |
| 7 |
=
| 3 |
| 4 |
| 25 |
| 28 |
=
| 23 |
| 14 |
点评:主要考查学生对分数四则运算法则的掌握情况,注意能简算的要求简算.
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