1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 344 · 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 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.792 + 297 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.297 + 792 =
8. 8.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 477: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 439. 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. 17.396 + 693 =
18. 18.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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