| 1 |
| 6 |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
| 1 |
| () |
分析:把
| 1 |
| 6 |
| 1 |
| 6 |
| 1×2 |
| 6×2 |
| 1 |
| 12 |
| 1 |
| 12 |
若两个加数不相同,可利用分数的基本性质将分数的分子、分母扩大相同的倍数,再将分子拆成两个自然数的和,即:
| 1 |
| 6 |
| 1×A |
| 6×A |
| B+C |
| 6A |
| B |
| 6A |
| C |
| 6A |
| B |
| 6A |
| C |
| 6A |
所以
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 15 |
| 1 |
| 10 |
| 1 |
| 18 |
| 1 |
| 9 |
| 1 |
| 24 |
| 1 |
| 8 |
| 1 |
| 42 |
| 1 |
| 7 |
根据对上述材料的理解完成下列各题:
(1)在下面括号里填上相同的自然数,使等式成立
| 1 |
| 10 |
| 1 |
| () |
| 1 |
| () |
(2)已知
| 1 |
| 10 |
| 1 |
| A |
| 1 |
| B |
(A、B是不相等的自然数)求所有满足条件A、B的值.(直接写出答案).(1)
| 1 |
| 10 |
| 1×2 |
| 10×2 |
| 1 |
| 20 |
| 1 |
| 20 |
(2)
| 1 |
| 10 |
| 1 |
| 30 |
| 1 |
| 15 |
| 1 |
| 60 |
| 1 |
| 12 |
| 1 |
| 110 |
| 1 |
| 11 |
| 1 |
| 35 |
| 1 |
| 14 |
所以A=30、B=15;A=60、B=12;A=110、B=11;A=35、B=14 (每组A、B的取值可任意交换).