4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 58 · 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. 1.2443 + 6841 =
2. 2.4484 + 3306 =
3. 3.7361 + 3778 =
4. 4.7009 − 4444 =
5. 5.4119 − 3140 =
6. 6.7469 − 3445 =
7. 7.4793 − 4471 =
8. 8.6781 + 2225 =
9. 9.7396 − 2104 =
10. 10.3850 − 3805 =
11. 11.5187 + 3175 =
12. 12.3479 + 4434 =
13. 13.7252 − 2956 =
14. 14.6904 − 3467 =
15. 15.8401 − 7012 =
16. 16.8374 − 2009 =
17. 17.5732 + 4679 =
18. 18.4886 − 3354 =
19. 19.3717 + 3588 =
20. 20.7294 + 5124 =
21. 21.3551 − 2747 =
22. 22.8076 − 1914 =
23. 23.6240 − 6046 =
24. 24.6774 − 3876 =
25. 25.2647 + 3942 =
26. 26.7573 − 1398 =
27. 27.2125 + 2367 =
28. 28.2962 − 1676 =
29. 29.1532 + 7700 =
30. 30.8024 − 7805 =
31. 31.6170 + 5606 =
32. 32.7923 + 6621 =
33. 33.3539 + 8452 =
34. 34.1292 + 2299 =
35. 35.3602 + 1399 =
36. 36.8906 + 8616 =
37. 37.1604 + 7733 =
38. 38.3467 + 7914 =
39. 39.8031 + 2744 =
40. 40.4900 + 7683 =

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