1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 135 · 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 371: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.594 + 495 =
15. 15.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 589: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.297 + 792 =
39. 39.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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