4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 184 · 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. 1.2651 + 1222 =
2. 2.8094 + 2083 =
3. 3.5545 − 3179 =
4. 4.8879 + 7272 =
5. 5.1130 + 8737 =
6. 6.7160 + 7998 =
7. 7.7956 − 6737 =
8. 8.4952 − 2553 =
9. 9.6896 + 7766 =
10. 10.3194 + 3031 =
11. 11.7979 − 4209 =
12. 12.4302 + 6302 =
13. 13.3870 + 6373 =
14. 14.6474 − 6177 =
15. 15.2523 − 2204 =
16. 16.8800 − 6210 =
17. 17.3912 + 3594 =
18. 18.6846 + 7245 =
19. 19.1575 + 3373 =
20. 20.8896 + 7824 =
21. 21.5416 − 1636 =
22. 22.3400 − 3143 =
23. 23.6541 − 2105 =
24. 24.3440 + 7520 =
25. 25.4829 − 3003 =
26. 26.5360 + 7124 =
27. 27.2978 + 3569 =
28. 28.3934 + 1528 =
29. 29.3173 − 1505 =
30. 30.8307 + 8277 =
31. 31.8188 − 7129 =
32. 32.7430 − 4840 =
33. 33.7639 − 5233 =
34. 34.2783 + 6221 =
35. 35.3684 − 1869 =
36. 36.2989 − 2033 =
37. 37.4835 + 4527 =
38. 38.3642 − 2551 =
39. 39.2320 + 4442 =
40. 40.1482 + 2263 =

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