4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 128 · 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. 1.6005 − 5159 =
2. 2.6775 − 3909 =
3. 3.2864 + 7364 =
4. 4.7084 + 5743 =
5. 5.5283 + 3769 =
6. 6.4917 + 7496 =
7. 7.5308 − 1268 =
8. 8.7544 − 7454 =
9. 9.3356 + 8124 =
10. 10.2877 + 6394 =
11. 11.8773 − 1639 =
12. 12.7655 − 5529 =
13. 13.5250 − 5132 =
14. 14.2939 + 5032 =
15. 15.5560 + 4481 =
16. 16.5051 + 6394 =
17. 17.7443 − 4511 =
18. 18.8422 + 4240 =
19. 19.7773 + 5075 =
20. 20.3567 + 8365 =
21. 21.8105 + 1588 =
22. 22.2419 + 6745 =
23. 23.6829 − 4624 =
24. 24.8303 − 1214 =
25. 25.8296 − 2191 =
26. 26.5171 + 8810 =
27. 27.5507 − 4911 =
28. 28.1678 + 8378 =
29. 29.3249 + 7557 =
30. 30.2159 + 1379 =
31. 31.3613 − 3169 =
32. 32.3171 + 1923 =
33. 33.7952 − 2759 =
34. 34.8790 − 5625 =
35. 35.7901 − 6739 =
36. 36.3359 + 2679 =
37. 37.3597 + 3519 =
38. 38.8798 − 3595 =
39. 39.2367 − 1212 =
40. 40.3954 + 7402 =

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