4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 133 · 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. 1.5257 + 6538 =
2. 2.5868 − 2837 =
3. 3.7608 − 1215 =
4. 4.3425 + 3686 =
5. 5.6975 + 6017 =
6. 6.5656 − 2133 =
7. 7.1795 + 2592 =
8. 8.8600 − 3591 =
9. 9.8735 − 8227 =
10. 10.3782 + 7534 =
11. 11.6609 + 2709 =
12. 12.8563 + 3167 =
13. 13.8331 − 5596 =
14. 14.6673 + 5567 =
15. 15.8681 − 6536 =
16. 16.8848 − 7005 =
17. 17.6964 + 2428 =
18. 18.2142 + 3199 =
19. 19.8003 − 3368 =
20. 20.8801 + 7147 =
21. 21.1624 + 1854 =
22. 22.1943 − 1805 =
23. 23.5091 − 3243 =
24. 24.1883 − 1782 =
25. 25.5735 + 7887 =
26. 26.7595 + 3012 =
27. 27.3322 + 6581 =
28. 28.2598 + 3598 =
29. 29.6141 − 2317 =
30. 30.4195 − 3906 =
31. 31.2284 + 7825 =
32. 32.4980 − 3217 =
33. 33.8425 + 5664 =
34. 34.7609 − 4787 =
35. 35.8210 − 2226 =
36. 36.3872 + 6338 =
37. 37.2712 + 5714 =
38. 38.8855 + 8801 =
39. 39.8600 − 1521 =
40. 40.6290 + 2726 =

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