一、口算。
$8÷ 2=$
$9× 6=$
$37-18=$
$30÷ 5=$
$7× 7=$
$18+50=$
$28÷ 7=$
$28+58=$
$9× 9=$
$56÷ 8=$
$3× 3=$
$32÷ 4=$
$93-66=$
$21÷ 3=$
$8× 2=$
$65-50=$
$16÷ 4=$
$5× 9=$
$63÷ 7=$
$33+29=$
$27÷ 3+18=$
$27+30+13=$
$18÷ 2÷ 3=$
$57-18-19=$
$42÷ 6× 5=$
$46+40-78=$
$70-13+20=$
$10÷ 2+25=$
$9× 4-18=$
$36÷ 6× 4=$

1. 4
2. 54
3. 19
4. 6
5. 49
6. 68
7. 4
8. 86
9. 81
10. 7
11. 9
12. 8
13. 27
14. 7
15. 16
16. 15
17. 4
18. 45
19. 9
20. 62
21. 27
22. 70
23. 3
24. 20
25. 35
26. 8
27. 77
28. 30
29. 18
30. 24

二、在$□$里填合适的数。
$79÷□=8······7$
$25÷□=3······4$
$31÷□=6······1$
$17÷□=3······2$
$34÷□=4······6$
$43÷□=5······3$
$20÷□=6······2$
$22÷□=2······6$
$53÷□=6······5$
$59÷□=9······5$
$54÷□=7······5$
$67÷□=9······4$
$37÷□=6······1$
$62÷□=6······8$
$77÷□=8······5$

1. 9
2. 7
3. 5
4. 5
5. 7
6. 8
7. 3
8. 8
9. 8
10. 6
11. 7
12. 7
13. 6
14. 9
15. 9