1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 828 · 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 520: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.891 + 198 =
3. 3.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.495 + 594 =
11. 11.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 371: 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 1. What is that number?
14. 14.594 + 495 =
15. 15.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.198 + 891 =
21. 21.297 + 792 =
22. 22.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.693 + 396 =
32. 32.Do the 1089 trick with 267: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 294. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 507: reverse and subtract, then reverse that answer and add. What do you get?

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