分数计算题:
1. 3/7 × 49/9
- 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 –
2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 –
3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -
(
3/2 + 4/5
)
8. 7/8 +
(
1/8 + 1/9
)
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9
- 1/3
11. 7 × 5/49 + 3/14
12. 6 ×(
1/2 + 2/3
)
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 –
5/6
15. 9/7 -
(
2/7
–
10/21
)
16. 5/9 × 18 –
14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 –
5/6 × 12/15
19. 17/32
–
3/4 × 9/24
20. 3 × 2/9 + 1/3