4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 190 · 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. 1.8548 − 2637 =
2. 2.5300 + 3005 =
3. 3.6254 − 4522 =
4. 4.8788 − 6256 =
5. 5.8527 + 4388 =
6. 6.2435 + 7905 =
7. 7.7302 − 6668 =
8. 8.2595 + 6910 =
9. 9.7694 − 2346 =
10. 10.5851 + 2536 =
11. 11.2605 − 1443 =
12. 12.8724 − 5417 =
13. 13.7434 − 2342 =
14. 14.7284 − 6254 =
15. 15.7626 + 8478 =
16. 16.3383 + 5149 =
17. 17.8907 − 4374 =
18. 18.4805 + 3370 =
19. 19.6141 − 3901 =
20. 20.7758 − 5737 =
21. 21.5788 − 1710 =
22. 22.5152 + 5814 =
23. 23.3282 − 1837 =
24. 24.6725 + 6824 =
25. 25.6071 + 7140 =
26. 26.1345 + 3533 =
27. 27.6048 + 4236 =
28. 28.5456 − 2758 =
29. 29.4141 − 2685 =
30. 30.1486 + 4416 =
31. 31.3062 + 4296 =
32. 32.8237 + 8597 =
33. 33.3676 + 2723 =
34. 34.8844 − 2525 =
35. 35.6903 − 4101 =
36. 36.2892 + 1878 =
37. 37.3792 + 6513 =
38. 38.8931 − 1960 =
39. 39.2686 + 2530 =
40. 40.3134 − 1400 =

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