1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 792 · 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 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.198 + 891 =
14. 14.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.495 + 594 =
23. 23.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 960: 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 5. What is that number?
29. 29.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
31. 31.693 + 396 =
32. 32.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 308: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 760. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 772: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?

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