1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 325 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Do the 1089 trick with 377: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 648: 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 5. What is that number?
18. 18.297 + 792 =
19. 19.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 591: 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 7. What is that number?
24. 24.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 658: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 663: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 630. Reverse its digits and take the smaller number away from the bigger one. 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.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.594 + 495 =

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