1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 844 · 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 399: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Do the 1089 trick with 970: 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 5. What is that number?
6. 6.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.792 + 297 =
9. 9.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.297 + 792 =
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 178: 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. 18.396 + 693 =
19. 19.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 426: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.594 + 495 =
40. 40.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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