4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 185 · 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. 1.1445 + 6062 =
2. 2.4851 + 6939 =
3. 3.8691 − 8157 =
4. 4.8634 − 5116 =
5. 5.1738 + 2941 =
6. 6.4505 + 2460 =
7. 7.5507 + 5563 =
8. 8.2031 + 6557 =
9. 9.2441 + 5709 =
10. 10.6613 − 1384 =
11. 11.2156 − 2154 =
12. 12.2040 + 1906 =
13. 13.1879 + 7078 =
14. 14.1435 + 1644 =
15. 15.2096 + 5945 =
16. 16.5615 + 5327 =
17. 17.8259 − 1353 =
18. 18.6719 + 3585 =
19. 19.4205 − 1170 =
20. 20.4190 − 3065 =
21. 21.6218 + 7688 =
22. 22.8890 − 1447 =
23. 23.8479 − 2691 =
24. 24.8096 + 2082 =
25. 25.4338 + 6406 =
26. 26.2935 + 8543 =
27. 27.4430 + 6564 =
28. 28.3033 + 6091 =
29. 29.6673 + 3889 =
30. 30.2275 + 3535 =
31. 31.2005 − 1140 =
32. 32.5540 + 2452 =
33. 33.7174 − 1866 =
34. 34.7570 + 7162 =
35. 35.4871 − 4537 =
36. 36.7362 − 2632 =
37. 37.2871 − 1120 =
38. 38.7679 − 6961 =
39. 39.8034 + 2857 =
40. 40.6830 + 5242 =

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths