4-Digit Mental Addition and Subtraction Worksheet

Speed calculation lesson 16: Split and join: 4-digit sums · Set 178 · 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. 1.7351 − 6761 =
2. 2.3889 − 1975 =
3. 3.7774 − 5186 =
4. 4.8955 − 4011 =
5. 5.1731 − 1469 =
6. 6.2234 + 5055 =
7. 7.3284 + 3208 =
8. 8.7699 − 2008 =
9. 9.7371 − 1271 =
10. 10.1391 + 1314 =
11. 11.2569 − 2362 =
12. 12.4385 + 1197 =
13. 13.4555 − 3971 =
14. 14.8002 + 8297 =
15. 15.5223 + 5995 =
16. 16.6231 − 1617 =
17. 17.8663 − 4825 =
18. 18.6291 − 5949 =
19. 19.8234 − 4008 =
20. 20.6488 − 2052 =
21. 21.2300 − 1282 =
22. 22.2528 + 2825 =
23. 23.1877 + 4471 =
24. 24.8336 − 5846 =
25. 25.2352 + 1109 =
26. 26.5640 + 6195 =
27. 27.3910 − 3472 =
28. 28.6267 − 1255 =
29. 29.4859 − 2625 =
30. 30.6186 − 5257 =
31. 31.3782 + 4355 =
32. 32.6006 − 4124 =
33. 33.6947 + 3141 =
34. 34.7145 − 4472 =
35. 35.6807 − 6275 =
36. 36.7034 − 2686 =
37. 37.7881 − 2626 =
38. 38.5159 + 6253 =
39. 39.5009 − 4496 =
40. 40.3345 + 2493 =

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