2
520÷40= 206×4= 110×4=
600÷5= 23×30= 17×30=
600÷50= 90÷15= 60÷5=
960÷8= 1600×4= 105×5=
960÷80= 64÷16= 70×16=
630÷9= 125×4= 86÷2=
630÷90= 85÷17= 130×5=
420÷2= 1000÷4= 98÷7=
420÷20= 73×40= 66×30=
38÷2= 51÷3= 24×50=
720÷6= 91÷7= 160÷4=
650÷5= 96÷4= 720÷4=

1. $520 ÷ 40 = 13$
2. $206 × 4 = 824$
3. $110 × 4 = 440$
4. $600 ÷ 5 = 120$
5. $23 × 30 = 690$
6. $17 × 30 = 510$
7. $600 ÷ 50 = 12$
8. $90 ÷ 15 = 6$
9. $60 ÷ 5 = 12$
10. $960 ÷ 8 = 120$
11. $1600 × 4 = 6400$
12. $105 × 5 = 525$
13. $960 ÷ 80 = 12$
14. $64 ÷ 16 = 4$
15. $70 × 16 = 1120$
16. $630 ÷ 9 = 70$
17. $125 × 4 = 500$
18. $86 ÷ 2 = 43$
19. $630 ÷ 90 = 7$
20. $85 ÷ 17 = 5$
21. $130 × 5 = 650$
22. $420 ÷ 2 = 210$
23. $1000 ÷ 4 = 250$
24. $98 ÷ 7 = 14$
25. $420 ÷ 20 = 21$
26. $73 × 40 = 2920$
27. $66 × 30 = 1980$
28. $38 ÷ 2 = 19$
29. $51 ÷ 3 = 17$
30. $24 × 50 = 1200$
31. $720 ÷ 6 = 120$
32. $91 ÷ 7 = 13$
33. $160 ÷ 4 = 40$
34. $650 ÷ 5 = 130$
35. $96 ÷ 4 = 24$
36. $720 ÷ 4 = 180$

李虎、王明、笑笑期末考试中语文、数学、英语的三科成绩如下表，他们这三科的平均成绩是多少，怎么求得

| | 语文 | 数学 | 英语 | 平均分 | 列算式 |
| --- | --- | --- | --- | --- | --- |
| 李虎 | 82 | 90 | 98 | 90 | $(82 + 90 + 98) ÷ 3 = 270 ÷ 3 = 90$ |
| 王明 | 94 | 86 | 90 | 90 | $(94 + 86 + 90) ÷ 3 = 270 ÷ 3 = 90$ |
| 笑笑 | 91 | 98 | 96 | 95 | $(91 + 98 + 96) ÷ 3 = 285 ÷ 3 = 95$ |