4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 176 · 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. 1.7039 + 2788 =
2. 2.4129 + 2969 =
3. 3.8214 + 7340 =
4. 4.1191 + 1509 =
5. 5.6349 − 1177 =
6. 6.2657 − 1299 =
7. 7.2785 + 6437 =
8. 8.4195 − 1276 =
9. 9.3101 − 1694 =
10. 10.5300 + 4007 =
11. 11.5273 + 1319 =
12. 12.5046 + 6679 =
13. 13.4177 + 6803 =
14. 14.8387 − 4486 =
15. 15.6773 − 6412 =
16. 16.8760 + 5361 =
17. 17.6540 − 5775 =
18. 18.7921 + 2089 =
19. 19.5070 − 2921 =
20. 20.6657 + 3419 =
21. 21.5919 + 2311 =
22. 22.8458 + 1975 =
23. 23.2567 − 2343 =
24. 24.4638 + 7573 =
25. 25.3322 + 1702 =
26. 26.5461 − 4902 =
27. 27.6998 + 5963 =
28. 28.8055 − 5198 =
29. 29.8688 + 2452 =
30. 30.6781 − 1396 =
31. 31.6311 + 2499 =
32. 32.2475 + 5782 =
33. 33.1143 + 3474 =
34. 34.2795 + 3824 =
35. 35.5559 + 6277 =
36. 36.4227 − 3176 =
37. 37.4661 − 4552 =
38. 38.1181 + 1814 =
39. 39.2641 + 6006 =
40. 40.6524 − 2711 =

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