题目内容
脱式计算
①(8-
÷
)×
②52÷(1-
×
)×
.
①(8-
4 |
9 |
1 |
3 |
9 |
5 |
②52÷(1-
1 |
2 |
7 |
10 |
7 |
8 |
分析:根据分数的四则混合运算进行解答即可得到答案.
解答:解:①(8-
÷
)×
=(8-
)×
,
=
×
,
=12;
②52÷(1-
×
)×
=52÷(1-
)×
,
=52÷
×
.
=52×
×
,
=70.
4 |
9 |
1 |
3 |
9 |
5 |
=(8-
4 |
3 |
9 |
5 |
=
20 |
3 |
9 |
5 |
=12;
②52÷(1-
1 |
2 |
7 |
10 |
7 |
8 |
=52÷(1-
7 |
20 |
7 |
8 |
=52÷
13 |
20 |
7 |
8 |
=52×
20 |
13 |
7 |
8 |
=70.
点评:此题主要考查的是分数的四则混合运算.
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