4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 149 · 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. 1.5733 − 3063 =
2. 2.2060 + 1163 =
3. 3.2321 + 3031 =
4. 4.5563 + 7476 =
5. 5.3437 + 5102 =
6. 6.7201 + 3882 =
7. 7.4287 + 8242 =
8. 8.2254 + 3199 =
9. 9.8632 − 3918 =
10. 10.7229 − 6811 =
11. 11.3424 + 8851 =
12. 12.7448 − 7218 =
13. 13.2808 + 3607 =
14. 14.8843 − 3739 =
15. 15.5378 + 1544 =
16. 16.8185 + 1677 =
17. 17.4925 − 4115 =
18. 18.5014 − 4241 =
19. 19.4814 + 1827 =
20. 20.7522 + 4987 =
21. 21.6089 + 3960 =
22. 22.5590 − 2243 =
23. 23.3674 + 7193 =
24. 24.2481 + 1480 =
25. 25.6348 + 1326 =
26. 26.5942 − 1793 =
27. 27.7645 − 7617 =
28. 28.8967 + 4214 =
29. 29.6632 + 6660 =
30. 30.6148 + 5443 =
31. 31.4444 − 4181 =
32. 32.8017 + 8961 =
33. 33.2273 + 2357 =
34. 34.5091 − 4123 =
35. 35.8349 − 3064 =
36. 36.6985 + 3605 =
37. 37.4310 − 2890 =
38. 38.8734 − 6281 =
39. 39.8954 + 2418 =
40. 40.8183 + 6742 =

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