4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 53 · 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. 1.4391 + 4679 =
2. 2.1393 + 1399 =
3. 3.2193 + 3230 =
4. 4.5253 + 5503 =
5. 5.6014 + 5060 =
6. 6.7016 + 4370 =
7. 7.3218 + 7287 =
8. 8.8110 − 3191 =
9. 9.8736 − 6212 =
10. 10.4002 − 2914 =
11. 11.8063 + 4209 =
12. 12.8588 − 7208 =
13. 13.3659 + 2381 =
14. 14.8541 − 7530 =
15. 15.6472 + 5094 =
16. 16.3369 − 2917 =
17. 17.4888 − 3385 =
18. 18.4523 − 1242 =
19. 19.4855 − 1637 =
20. 20.8491 − 7568 =
21. 21.8400 + 5933 =
22. 22.7589 + 5054 =
23. 23.6089 + 3046 =
24. 24.8576 − 1890 =
25. 25.3609 + 6989 =
26. 26.7805 + 5014 =
27. 27.7864 + 4413 =
28. 28.7802 − 3346 =
29. 29.3040 + 1342 =
30. 30.6414 + 7671 =
31. 31.4930 − 3681 =
32. 32.6892 − 3462 =
33. 33.8547 − 3098 =
34. 34.1721 + 6063 =
35. 35.8454 + 4933 =
36. 36.4423 − 4259 =
37. 37.3720 + 3467 =
38. 38.1668 + 5869 =
39. 39.6836 − 2300 =
40. 40.8118 + 5868 =

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