4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 93 · 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. 1.8758 − 3446 =
2. 2.8364 + 4772 =
3. 3.2685 − 2025 =
4. 4.5053 − 4112 =
5. 5.2705 + 8151 =
6. 6.4465 − 4355 =
7. 7.2744 − 1463 =
8. 8.2657 − 2615 =
9. 9.1775 + 8240 =
10. 10.3313 − 1253 =
11. 11.3455 + 8568 =
12. 12.6118 − 4681 =
13. 13.3950 − 1946 =
14. 14.5946 + 4222 =
15. 15.8253 + 8019 =
16. 16.8331 − 2937 =
17. 17.3073 + 1582 =
18. 18.4822 + 6329 =
19. 19.5762 + 5145 =
20. 20.2031 + 4466 =
21. 21.3441 + 6873 =
22. 22.1472 + 3154 =
23. 23.2139 + 2167 =
24. 24.2927 + 3016 =
25. 25.7179 + 6978 =
26. 26.4515 + 5083 =
27. 27.8611 − 1928 =
28. 28.3636 + 7592 =
29. 29.3556 + 8388 =
30. 30.2630 + 3628 =
31. 31.1554 + 3146 =
32. 32.6254 + 5508 =
33. 33.5570 − 4036 =
34. 34.8184 − 1298 =
35. 35.4582 + 3085 =
36. 36.7899 − 6248 =
37. 37.2525 − 1515 =
38. 38.1242 + 1504 =
39. 39.3720 − 1735 =
40. 40.6554 − 3761 =

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