4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 27 · 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. 1.4463 + 6785 =
2. 2.6470 + 2279 =
3. 3.3633 + 3652 =
4. 4.3663 − 1996 =
5. 5.8974 − 5690 =
6. 6.2308 − 1357 =
7. 7.7354 − 4297 =
8. 8.8943 − 6356 =
9. 9.6678 − 2755 =
10. 10.8439 − 6879 =
11. 11.2925 + 6150 =
12. 12.2203 + 6446 =
13. 13.7369 + 8699 =
14. 14.2414 + 4029 =
15. 15.3894 − 1401 =
16. 16.5164 + 5428 =
17. 17.7324 − 1125 =
18. 18.4390 + 2796 =
19. 19.8799 + 3591 =
20. 20.5770 + 2513 =
21. 21.3044 + 7149 =
22. 22.8425 + 3724 =
23. 23.2080 − 2029 =
24. 24.3321 + 1212 =
25. 25.8758 − 6447 =
26. 26.8838 − 1510 =
27. 27.8186 − 5061 =
28. 28.8181 − 1861 =
29. 29.8172 − 5262 =
30. 30.7597 − 3579 =
31. 31.8446 − 1463 =
32. 32.7982 − 5940 =
33. 33.5910 − 4200 =
34. 34.5598 − 4092 =
35. 35.5953 + 4657 =
36. 36.6998 + 3247 =
37. 37.2399 + 2998 =
38. 38.2034 + 4090 =
39. 39.1470 + 4101 =
40. 40.5642 + 5133 =

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