题目内容
在横线里填上>、<或=.
5-3×
÷
+
÷
+
)÷
.
5-3×
| 7 |
| 9 |
>
>
2×| 7 |
| 9 |
| 4 |
| 7 |
| 9 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
=
=
(| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
分析:(1)可根据分数乘法与除法的运算法则有四则混合运算的运算顺序分别计算出两边算式的结果后进行比较.
(2)可根据乘法分配律进行分析比较.
(2)可根据乘法分配律进行分析比较.
解答:解:(1)5-3×
=5-
,
=
;
2×
=
;
>
,
则5-3×
>2×
.
(2)
÷
+
÷
=
×
+
×
=(
+
)
.
(
+
)÷
=(
+
)×
.
则
÷
+
÷
=(
+
)÷
.
故答案为:>,=.
| 7 |
| 9 |
=5-
| 21 |
| 9 |
=
| 24 |
| 9 |
2×
| 7 |
| 9 |
| 14 |
| 9 |
| 24 |
| 9 |
| 14 |
| 9 |
则5-3×
| 7 |
| 9 |
| 7 |
| 9 |
(2)
| 4 |
| 7 |
| 9 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
=
| 4 |
| 7 |
| 5 |
| 9 |
| 3 |
| 7 |
| 5 |
| 9 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 5 |
| 9 |
(
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 5 |
| 9 |
则
| 4 |
| 7 |
| 9 |
| 5 |
| 3 |
| 7 |
| 9 |
| 5 |
| 4 |
| 7 |
| 3 |
| 7 |
| 9 |
| 5 |
故答案为:>,=.
点评:完成本题要认真分析计算两边的算式中的数据,然后做出正确的判断.
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