题目内容
把下面的带分数化成假分数,要写出转化过程.2
;3
;1
;8
.
| 3 |
| 4 |
| 4 |
| 7 |
| 5 |
| 12 |
| 2 |
| 3 |
分析:把带分数化成假分数和方法是:用整数部分乘分数的分母再加上分子的和作分子,分母不变.据此解答.
解答:解:(1)2
=
=
=
;
(2)3
=
=
=
;
(3)1
=
=
=
;
(4)8
=
=
=
.
| 3 |
| 4 |
| 2×4+3 |
| 4 |
| 8+3 |
| 4 |
| 11 |
| 4 |
(2)3
| 4 |
| 7 |
| 3×7+4 |
| 7 |
| 21+4 |
| 7 |
| 25 |
| 7 |
(3)1
| 5 |
| 12 |
| 1×12+5 |
| 12 |
| 12+5 |
| 12 |
| 17 |
| 12 |
(4)8
| 2 |
| 3 |
| 8×3+2 |
| 3 |
| 24+2 |
| 3 |
| 26 |
| 3 |
点评:本题主要考查了学生对带分数化成假分数方法的掌握情况.
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