1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 19 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.198 + 891 =
14. 14.297 + 792 =
15. 15.891 + 198 =
16. 16.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.594 + 495 =
19. 19.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.792 + 297 =
28. 28.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 254: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.693 + 396 =
35. 35.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 785: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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