2×1.7+2×1.3 0.4×101-0.4 1.25×0.7×0.8 0.79+0.79×99
1÷5+1÷5 0.89×101-0.89 2-0.64-0.36 1.1-2.7÷27
12.4×11-12.4 1.25×3.3×0 20-3.7-7.3 5×0.75÷1.5×0.75
1-0.1×0.1 6×0.125×8 1×0.4÷1×0.4 37.2×99+37.2
25×4÷0.25×4 0.9×7+10.7 9÷5-1.9÷5 6.8-2.4÷3
0.6÷0.3+0.5 1.9+5.1÷51 1.8÷0.9×0.5 12-0.05×4
1×0.01÷0.1 7.2-1.2+6.7 25×3.3×0 3.2×0.25×12.5
(1.25-0.125)×8 7.74×(2.8-1.3)+1.5×2.26 21×(9.3-3.7)-5.6
36.54-1.76-4.54 23.4-0.8-13.4-7.2 13.7×0.25-3.7÷4
自己选几道
1/2-1/3-1/6
4/7+5/11+5/7
5/8+2/11+9/11
17/24+5/12-11/24
11/12+1/6-5/24
5/6-5/7+1/6-1/7
4/5-(1/4+2/5)
1-1/4-3/4
5/7+5/9+2/7+4/9
.(23/4-3/4)×(3×6+2)
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
22. 17/32 – 3/4 × 9/24
23. 3 × 2/9 + 1/3
24. 5/7 × 3/25 + 3/7
3/14 ×× 2/3 + 1/6
1/5 × 2/3 + 5/6
9/22 + 1/11 ÷ 1/2
5/3 × 11/5 + /3
45 × 2/3 + 1/3 × 15
7/19 + 12/19 × 5/6
1/4 + 3/4 ÷ 2/3
8/7 × 21/16 + 1/2
(2-2/3/1/2)]*2/5
妈的