一、口算。
$93 - 60 =$
$63 ÷ 9 =$
$19 ÷ 3 =$
$12 ÷ 4 =$
$36 + 39 =$
$23 ÷ 5 =$
$5 × 8 =$
$35 ÷ 5 =$
$34 ÷ 7 =$
$54 ÷ 6 =$
$4 × 7 =$
$49 ÷ 9 =$
$8 × 7 =$
$58 + 23 =$
$52 ÷ 8 =$
$49 ÷ 7 =$
$54 - 36 =$
$67 ÷ 9 =$
$9 × 9 =$
$36 ÷ 9 =$
$75 ÷ 9 =$
$47 - 30 =$
$4 × 8 =$
$28 ÷ 6 =$
$72 ÷ 8 =$
$14 ÷ 2 =$
$37 ÷ 5 =$
$3 × 4 =$
$63 + 27 =$
$55 ÷ 6 =$

1. 33
2. 7
3. 6……1
4. 3
5. 75
6. 4……3
7. 40
8. 7
9. 4……6
10. 9
11. 28
12. 5……4
13. 56
14. 81
15. 6……4
16. 7
17. 18
18. 7……4
19. 81
20. 4
21. 8……3
22. 17
23. 32
24. 4……4
25. 9
26. 7
27. 7……2
28. 12
29. 90
30. 9……1

二、照样子，填一填。
$32 - 23 = 9 × 1 = 9$
$42 - 24 = 9 × □ = □$
$52 - 25 = 9 × □ = □$
$62 - 26 = □ × □ = □$
$71 - 17 = □ × □ = □$

1. 2，18
2. 3，27
3. 9，4，36
4. 9，6，54