4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 191 · 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. 1.4280 + 2004 =
2. 2.7669 − 3788 =
3. 3.6549 − 5021 =
4. 4.2913 + 5183 =
5. 5.4827 − 4431 =
6. 6.2218 + 6506 =
7. 7.8555 + 6846 =
8. 8.4962 + 7639 =
9. 9.7216 − 1594 =
10. 10.5128 + 4049 =
11. 11.5929 − 4167 =
12. 12.8121 + 4618 =
13. 13.4184 − 2489 =
14. 14.6293 − 3795 =
15. 15.6929 − 1875 =
16. 16.1369 + 5817 =
17. 17.1597 + 1608 =
18. 18.4610 − 1231 =
19. 19.3946 + 5055 =
20. 20.4549 − 1672 =
21. 21.7339 − 4517 =
22. 22.2297 + 2366 =
23. 23.7597 + 6071 =
24. 24.7153 − 2797 =
25. 25.4940 − 2013 =
26. 26.7802 − 3153 =
27. 27.2638 − 1549 =
28. 28.6720 − 1662 =
29. 29.6879 − 3661 =
30. 30.6096 − 1747 =
31. 31.6221 + 2703 =
32. 32.5850 + 7683 =
33. 33.6801 − 1648 =
34. 34.8339 − 1310 =
35. 35.1235 + 2943 =
36. 36.7993 − 4717 =
37. 37.8158 − 1222 =
38. 38.6748 − 4476 =
39. 39.3501 + 7522 =
40. 40.2506 + 2785 =

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