一、口算。
62 - 34 =
39 + 47 =
800 × 3 =
4 × 25 =
18 × 5 =
106 × 3 =
2 × 48 =
90 - 15 =
2 × 310 =
3 + 207 =
22 + 38 =
528 + 314 =
15 × 5 =
45 - 37 =
2 × 125 =
64 + 91 =
200 - 160 =
205 × 8 =
44 × 7 =
162 - 82 =
405 × 2 =
126 - 44 =
118 × 4 =
100 - 49 =

1. 62-34=28
2. 39+47=86
3. 800×3=2400
4. 4×25=100
5. 18×5=90
6. 106×3=318
7. 2×48=96
8. 90-15=75
9. 2×310=620
10. 3+207=210
11. 22+38=60
12. 528+314=842
13. 15×5=75
14. 45-37=8
15. 2×125=250
16. 64+91=155
17. 200-160=40
18. 205×8=1640
19. 44×7=308
20. 162-82=80
21. 405×2=810
22. 126-44=82
23. 118×4=472
24. 100-49=51

二、用竖式计算。
$5×62=$
$635-288=$
$408×9=$
$6×215=$
$282×7=$
$253+369=$

1. 5×62=310
2. 635-288=347
3. 408×9=3672
4. 6×215=1290
5. 282×7=1974
6. 253+369=622