1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 608 · 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.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 782. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Take 800. 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 5. What is that number?
11. 11.Do the 1089 trick with 956: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 116. 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 6. What is that number?
17. 17.693 + 396 =
18. 18.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.495 + 594 =
25. 25.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.594 + 495 =
31. 31.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.198 + 891 =
34. 34.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
38. 38.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 864. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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