4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 156 · 40 questions

The fast method (Split and join): Split each 4-digit number into two 2-digit halves: 4768 → 47|68. Work out the left halves and the right halves on their own. Adding: a right half of 100 or more carries 1 to the left half. Subtracting: right half too small? Borrow 1 from the left half — it is worth 100 on the right.

1. 1.6198 − 2333 =
2. 2.6409 + 1644 =
3. 3.1566 + 8302 =
4. 4.7903 − 5906 =
5. 5.1718 − 1526 =
6. 6.8771 − 3326 =
7. 7.3783 − 3119 =
8. 8.8013 − 5109 =
9. 9.1294 + 7107 =
10. 10.3420 + 7642 =
11. 11.8165 − 2564 =
12. 12.4483 + 6487 =
13. 13.6377 − 1651 =
14. 14.5170 + 6934 =
15. 15.5697 + 3867 =
16. 16.5543 + 4856 =
17. 17.7744 − 7469 =
18. 18.6464 − 4109 =
19. 19.8430 + 4668 =
20. 20.8533 − 2078 =
21. 21.5725 + 5690 =
22. 22.3727 + 2700 =
23. 23.2749 + 6536 =
24. 24.3076 − 2687 =
25. 25.7245 − 1245 =
26. 26.5360 − 2163 =
27. 27.2648 + 5140 =
28. 28.2885 + 5265 =
29. 29.4998 − 4780 =
30. 30.4579 − 4245 =
31. 31.8551 + 1619 =
32. 32.4041 − 1761 =
33. 33.7707 + 4946 =
34. 34.4189 − 2216 =
35. 35.5119 − 2602 =
36. 36.8291 − 1153 =
37. 37.7300 + 4036 =
38. 38.4802 − 1830 =
39. 39.2898 − 1729 =
40. 40.1137 + 1474 =

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths