1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 423 · 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 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.396 + 693 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 936: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.594 + 495 =
16. 16.297 + 792 =
17. 17.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 836. 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 8. What is that number?
20. 20.792 + 297 =
21. 21.693 + 396 =
22. 22.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.891 + 198 =
36. 36.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?

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