20道六年級分數計算題,要4個分數..

20道六年級分數計算題,要4個分數..

1 1/1*2*3+1/2*3*4+.+1/98*99*100
2 1/2-1/4-1/198+1/200
3 .(23/4-3/4)*(3*6+2)
4 4. 3/7×49/9 - 4/3
5. 8/9×15/36 + 1/27
6. 12×5/6–2/9×3
7. 8×5/4 + 1/4
8. 6÷3/8–3/8÷6
9. 4/7×5/9 + 3/7×5/9
10. 5/2 -(3/2 + 4/5)
11. 7/8 +(1/8 + 1/9)
12. 9×5/6 + 5/6
13. 3/4×8/9 - 1/3
14. 7×5/49 + 3/14
15. 6×(1/2 + 2/3)
16.8×4/5 + 8×11/5
17. 31×5/6–5/6
18. 9/7 -(2/7–10/21)
19. 5/9×18–14×2/7
20. 4/5×25/16 + 2/3×3/4
21. 14×8/7–5/6×12/15
如何?