题目内容
2
=
;
=
;
=
=
.
| 1 |
| 3 |
| ( ) |
| 3 |
| 3 |
| 4 |
| ( ) |
| 20 |
| 24 |
| 30 |
| ( ) |
| 10 |
| 12 |
| ( ) |
分析:(1)根据带分数化成假分数的方法求解;
(2)把分子和分母同时乘上5即可;
(3)先把
的分子分母同时除以3,再把
的分子和分母同时除以2即可.
(2)把分子和分母同时乘上5即可;
(3)先把
| 24 |
| 30 |
| 24 |
| 30 |
解答:解:(1)2
=
=
;
(2)
=
=
;
(3)
=
=
=
=
;
| 1 |
| 3 |
| 2×3+1 |
| 3 |
| 7 |
| 3 |
(2)
| 3 |
| 4 |
| 3×5 |
| 4×5 |
| 15 |
| 20 |
(3)
| 24 |
| 30 |
| 24÷3 |
| 30÷3 |
| 8 |
| 10 |
| 24÷2 |
| 30÷2 |
| 12 |
| 15 |
点评:本题考查了带分数化成假分数的方法,以及分数的基本性质.
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