1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 20 · 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 669: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.594 + 495 =
11. 11.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. 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 8. What is that number?
18. 18.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.891 + 198 =
22. 22.693 + 396 =
23. 23.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.297 + 792 =
29. 29.792 + 297 =
30. 30.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 823. 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 5. What is that number?
37. 37.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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