1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 781 · 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 850: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.495 + 594 =
8. 8.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.297 + 792 =
11. 11.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.396 + 693 =
14. 14.594 + 495 =
15. 15.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.891 + 198 =
27. 27.693 + 396 =
28. 28.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.792 + 297 =
35. 35.Do the 1089 trick with 234: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?

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