题目内容
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| ( ) |
| 1 |
| 12 |
分析:其他三个分数的和为1-
=
,把11拆成3个数相加的形式,并且使这3个数是12的因数,因此11=2+3+6,故三个分数是
=
,
=
,
=
.
| 1 |
| 12 |
| 11 |
| 12 |
| 2 |
| 12 |
| 1 |
| 6 |
| 3 |
| 12 |
| 1 |
| 4 |
| 6 |
| 12 |
| 1 |
| 2 |
解答:解:1-
=
11=2+3+6,
三个分数分别是:
=
,
=
,
=
.
因此,
+
+
+
=1
故答案为:2、4、6.
| 1 |
| 12 |
| 11 |
| 12 |
11=2+3+6,
三个分数分别是:
| 2 |
| 12 |
| 1 |
| 6 |
| 3 |
| 12 |
| 1 |
| 4 |
| 6 |
| 12 |
| 1 |
| 2 |
因此,
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
故答案为:2、4、6.
点评:此题主要考查了学生学习“分数的基本性质、分数加减法的计算方法”等知识后,运用有关知识解答有一定思维难度的数学问题的能力.
练习册系列答案
相关题目
观察等式,发现规律,写出得数.
|
(1)1.1 ×1.2=1.32 |
(2)1.1 ×2.1=2.31 |
(3)1.1 ×3.1=3.41 |
|
1.1 ×1.3=1.43 |
1.1 ×2.2=2.42 |
1.1 ×3.2=3.52 |
|
1.1 ×1.4=1.54 |
1.1 ×2.3=2.53 |
1.1 ×3.3=3.63 |
|
1.1 ×1.5=____ |
1.1 ×2.4=____ |
1.1 ×3.4=____ |
|
1.1 ×1.6=____ |
1.1 ×2.5=____ |
1.1 ×3.5=____ |
|
1.1 ×1.7=____ |
1.1 ×2.6=____ |
1.1 ×3.6=____ |