4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 92 · 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. 1.7677 + 7205 =
2. 2.6053 − 3498 =
3. 3.8706 − 8479 =
4. 4.8407 − 8337 =
5. 5.1260 + 3381 =
6. 6.2345 + 6331 =
7. 7.1459 + 4187 =
8. 8.1939 + 6277 =
9. 9.6483 − 1713 =
10. 10.8252 − 1528 =
11. 11.7487 + 2937 =
12. 12.2268 + 6776 =
13. 13.2033 + 1456 =
14. 14.7517 − 2236 =
15. 15.7257 − 6101 =
16. 16.4038 + 7021 =
17. 17.3001 − 1137 =
18. 18.2425 + 2752 =
19. 19.6509 + 7120 =
20. 20.2535 − 2086 =
21. 21.5616 + 8583 =
22. 22.8015 − 5800 =
23. 23.7126 − 2903 =
24. 24.2142 + 5400 =
25. 25.8795 − 3780 =
26. 26.7048 + 1463 =
27. 27.6942 + 6755 =
28. 28.4469 − 1604 =
29. 29.8360 − 1899 =
30. 30.3976 + 3865 =
31. 31.4856 + 8967 =
32. 32.5529 − 2580 =
33. 33.6655 − 3369 =
34. 34.7798 + 1266 =
35. 35.7555 − 4753 =
36. 36.8377 − 1747 =
37. 37.8237 − 4591 =
38. 38.5966 + 7702 =
39. 39.1131 + 1157 =
40. 40.8578 − 4986 =

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