1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 79 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 782. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.396 + 693 =
17. 17.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 841: 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 4. What is that number?
29. 29.594 + 495 =
30. 30.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.495 + 594 =
33. 33.198 + 891 =
34. 34.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?

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