题目内容
计算:
÷
÷
4×
÷
×
÷
×
÷
.
| 3 |
| 4 |
| 2 |
| 5 |
| 5 |
| 8 |
4×
| 2 |
| 28 |
| 2 |
| 3 |
| 2 |
| 13 |
| 5 |
| 8 |
| 15 |
| 26 |
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)把连除改为连乘计算;
(2)(3)(4)把除法改为乘法计算.
(2)(3)(4)把除法改为乘法计算.
解答:
解:(1)4÷
÷
=4×
×
=16;
(2)4×
÷
=
×
=
;
(3)
×
÷
=
×
×
=
;
(2)
×
÷
=
×
=
.
| 2 |
| 5 |
| 5 |
| 8 |
=4×
| 5 |
| 2 |
| 8 |
| 5 |
=16;
(2)4×
| 2 |
| 28 |
| 2 |
| 3 |
=
| 2 |
| 7 |
| 3 |
| 2 |
=
| 3 |
| 7 |
(3)
| 2 |
| 13 |
| 5 |
| 8 |
| 15 |
| 26 |
=
| 2 |
| 13 |
| 5 |
| 8 |
| 26 |
| 15 |
=
| 1 |
| 6 |
(2)
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
=
| 7 |
| 32 |
| 32 |
| 21 |
=
| 1 |
| 3 |
点评:混合运算的关键是抓住运算顺序,正确按照运算顺序计算.
练习册系列答案
相关题目
计量时间中最短的时间是( )
| A、秒 | B、时 | C、分 |