4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 33 · 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. 1.1936 − 1634 =
2. 2.3295 + 3073 =
3. 3.6613 + 8968 =
4. 4.3114 + 7917 =
5. 5.8967 − 2462 =
6. 6.8968 − 6959 =
7. 7.8092 − 4327 =
8. 8.7004 + 1792 =
9. 9.2156 + 1592 =
10. 10.3703 + 2621 =
11. 11.2509 + 3696 =
12. 12.8327 + 8712 =
13. 13.7261 − 1579 =
14. 14.4549 + 1917 =
15. 15.8698 + 4430 =
16. 16.4054 + 2583 =
17. 17.6252 − 4258 =
18. 18.8944 + 2853 =
19. 19.5723 + 1169 =
20. 20.7321 + 3789 =
21. 21.3030 + 7830 =
22. 22.4154 − 1189 =
23. 23.7420 − 6822 =
24. 24.6536 + 7022 =
25. 25.6465 − 3210 =
26. 26.4473 + 7129 =
27. 27.8450 − 2007 =
28. 28.2647 + 7586 =
29. 29.1953 + 5873 =
30. 30.6136 + 3070 =
31. 31.6760 − 6738 =
32. 32.6686 − 3420 =
33. 33.1637 + 1181 =
34. 34.8672 − 4671 =
35. 35.2408 + 8379 =
36. 36.8608 + 5056 =
37. 37.8820 + 5135 =
38. 38.4787 − 3942 =
39. 39.2543 + 6993 =
40. 40.1305 + 6166 =

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