一、口算。
$66+55=$
$330-60=$
$200-78=$
$66×4=$
$52×3=$
$6×700=$
$80×5=$
$3×32=$
$106×9=$
$72-56=$
$680-130=$
$125×2=$
$112×5=$
$4×600=$
$101×8=$
$7×800=$
$36×6=$
$220+180=$
$6×65=$
$362-112=$
$436+18=$
$4×140=$
$7×21=$
$222×4=$

1. 66+55=121
2. 330-60=270
3. 200-78=122
4. 66×4=264
5. 52×3=156
6. 6×700=4200
7. 80×5=400
8. 3×32=96
9. 106×9=954
10. 72-56=16
11. 680-130=550
12. 125×2=250
13. 112×5=560
14. 4×600=2400
15. 101×8=808
16. 7×800=5600
17. 36×6=216
18. 220+180=400
19. 6×65=390
20. 362-112=250
21. 436+18=454
22. 4×140=560
23. 7×21=147
24. 222×4=888

二、用竖式计算。
$663 - 297 =$
$437 + 436 =$
$254 × 7 =$
$304 × 6 =$
$218 × 9 =$
$250 × 8 =$

1. 663 - 297 = 366
2. 437 + 436 = 873
3. 254 × 7 = 1778
4. 304 × 6 = 1824
5. 218 × 9 = 1962
6. 250 × 8 = 2000