1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 685 · 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 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.792 + 297 =
4. 4.396 + 693 =
5. 5.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
27. 27.693 + 396 =
28. 28.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.198 + 891 =
35. 35.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 826: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 375. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?

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