4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 77 · 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. 1.7614 − 1927 =
2. 2.6582 − 2942 =
3. 3.6049 + 4742 =
4. 4.2405 − 1464 =
5. 5.2081 + 7362 =
6. 6.5510 − 4690 =
7. 7.7718 − 4112 =
8. 8.1756 + 5473 =
9. 9.1754 − 1288 =
10. 10.7551 − 2377 =
11. 11.2980 + 5492 =
12. 12.4369 + 1442 =
13. 13.1302 + 8672 =
14. 14.8679 − 1718 =
15. 15.2343 + 1326 =
16. 16.5035 − 4530 =
17. 17.1315 + 4351 =
18. 18.5565 + 1776 =
19. 19.6765 + 7392 =
20. 20.4211 + 2708 =
21. 21.3168 − 1692 =
22. 22.2796 + 5310 =
23. 23.6866 − 3673 =
24. 24.1119 + 7602 =
25. 25.5234 − 3940 =
26. 26.5885 − 4842 =
27. 27.3362 − 2213 =
28. 28.8742 − 5935 =
29. 29.7084 + 6450 =
30. 30.8292 − 6016 =
31. 31.8913 + 3678 =
32. 32.1203 + 5541 =
33. 33.8387 − 6233 =
34. 34.1273 + 7810 =
35. 35.8145 − 2615 =
36. 36.4856 + 5095 =
37. 37.5003 + 4620 =
38. 38.5489 − 2346 =
39. 39.6742 − 3910 =
40. 40.2207 + 8796 =

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