4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 141 · 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. 1.8060 − 4324 =
2. 2.1352 + 2087 =
3. 3.6773 − 6599 =
4. 4.1480 + 6979 =
5. 5.3028 + 6574 =
6. 6.3985 + 3420 =
7. 7.6247 − 4540 =
8. 8.3140 + 3521 =
9. 9.7152 − 1567 =
10. 10.2866 + 6351 =
11. 11.2097 + 3364 =
12. 12.1897 + 8041 =
13. 13.8996 + 7252 =
14. 14.2658 + 2508 =
15. 15.1619 + 8335 =
16. 16.4415 + 8615 =
17. 17.4273 + 8545 =
18. 18.6788 + 3127 =
19. 19.8093 − 6178 =
20. 20.7712 + 2040 =
21. 21.8520 + 5034 =
22. 22.6129 + 8470 =
23. 23.8392 − 5903 =
24. 24.1263 + 5246 =
25. 25.8258 + 6267 =
26. 26.2540 + 4461 =
27. 27.8607 + 2923 =
28. 28.6765 − 6575 =
29. 29.1564 + 1957 =
30. 30.7753 − 4427 =
31. 31.6784 − 4898 =
32. 32.7852 − 6995 =
33. 33.4538 − 4018 =
34. 34.1911 + 5487 =
35. 35.7966 − 5559 =
36. 36.5981 + 6247 =
37. 37.6707 + 8424 =
38. 38.7249 + 5151 =
39. 39.3210 + 3899 =
40. 40.6991 + 7493 =

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