4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 157 · 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. 1.8629 − 2417 =
2. 2.2329 + 5554 =
3. 3.8104 + 3570 =
4. 4.8025 − 2527 =
5. 5.8045 + 6021 =
6. 6.6523 − 2443 =
7. 7.2286 + 3299 =
8. 8.4483 + 1930 =
9. 9.6135 + 2611 =
10. 10.2756 + 1519 =
11. 11.6894 − 1178 =
12. 12.5478 − 1937 =
13. 13.4865 + 6883 =
14. 14.8196 + 1944 =
15. 15.7892 + 6872 =
16. 16.1983 − 1687 =
17. 17.2102 + 7949 =
18. 18.1973 + 2096 =
19. 19.8276 + 5739 =
20. 20.4139 − 1574 =
21. 21.7835 − 1549 =
22. 22.7942 − 5566 =
23. 23.7737 + 6584 =
24. 24.4386 − 1248 =
25. 25.3818 + 6725 =
26. 26.6727 + 7712 =
27. 27.7183 + 4129 =
28. 28.3117 + 2292 =
29. 29.8356 − 3369 =
30. 30.4165 − 1334 =
31. 31.4699 + 8504 =
32. 32.5039 + 4020 =
33. 33.4485 − 2462 =
34. 34.7410 + 5104 =
35. 35.2815 + 8507 =
36. 36.5630 − 1487 =
37. 37.4306 − 3030 =
38. 38.1281 + 7461 =
39. 39.1512 + 3477 =
40. 40.2498 − 1964 =

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