4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 67 · 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. 1.6943 − 3164 =
2. 2.7106 − 5421 =
3. 3.5972 + 3461 =
4. 4.4063 + 5897 =
5. 5.8372 − 5416 =
6. 6.1848 + 2568 =
7. 7.2608 + 8770 =
8. 8.6601 − 1976 =
9. 9.7909 + 1401 =
10. 10.2398 + 4392 =
11. 11.5208 + 2758 =
12. 12.8563 − 2460 =
13. 13.4001 + 7837 =
14. 14.1196 + 4017 =
15. 15.1852 + 5831 =
16. 16.4505 + 4368 =
17. 17.3976 − 2518 =
18. 18.8102 − 3099 =
19. 19.5641 − 1356 =
20. 20.8354 + 3041 =
21. 21.8189 + 7336 =
22. 22.8922 − 2787 =
23. 23.7193 + 6396 =
24. 24.7102 − 1474 =
25. 25.7441 + 3831 =
26. 26.6961 − 2192 =
27. 27.6543 − 4684 =
28. 28.3288 + 4471 =
29. 29.8307 − 7260 =
30. 30.3697 − 3202 =
31. 31.4466 + 2632 =
32. 32.5632 + 7910 =
33. 33.3780 − 3125 =
34. 34.6707 − 2621 =
35. 35.3126 + 5098 =
36. 36.2916 + 7458 =
37. 37.8259 − 4760 =
38. 38.4555 − 3365 =
39. 39.8895 + 6036 =
40. 40.7337 + 2105 =

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