4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 35 · 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. 1.8934 + 1755 =
2. 2.4118 − 4059 =
3. 3.7753 + 1140 =
4. 4.1934 + 2860 =
5. 5.7689 − 7240 =
6. 6.8710 + 8032 =
7. 7.8063 + 4150 =
8. 8.8642 − 7528 =
9. 9.8476 − 1608 =
10. 10.5451 − 2415 =
11. 11.4046 + 3057 =
12. 12.8228 + 7051 =
13. 13.7684 − 1649 =
14. 14.7641 + 7052 =
15. 15.5473 + 2877 =
16. 16.1522 + 6016 =
17. 17.3737 + 3448 =
18. 18.7692 − 7406 =
19. 19.1881 + 6809 =
20. 20.5566 + 2259 =
21. 21.1355 + 7367 =
22. 22.4792 − 3805 =
23. 23.5489 + 1756 =
24. 24.4788 + 8513 =
25. 25.5866 − 1483 =
26. 26.4066 − 3991 =
27. 27.7746 − 5889 =
28. 28.8489 + 4885 =
29. 29.6542 − 1219 =
30. 30.1709 + 1941 =
31. 31.7924 + 6705 =
32. 32.8461 − 6707 =
33. 33.4279 + 1450 =
34. 34.6015 + 3737 =
35. 35.7160 + 5673 =
36. 36.2522 + 5969 =
37. 37.6781 − 6638 =
38. 38.7988 − 2023 =
39. 39.2323 + 4634 =
40. 40.1846 + 6167 =

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