1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 677 · 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 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.891 + 198 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.792 + 297 =
15. 15.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.693 + 396 =
18. 18.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?

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