1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 638 · 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 224: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.693 + 396 =
4. 4.594 + 495 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.198 + 891 =
9. 9.Take 297. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 846. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 962. 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 2. What is that number?
17. 17.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 277: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 558: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.495 + 594 =
27. 27.891 + 198 =
28. 28.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?

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