1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 285 · 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. 1.297 + 792 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.693 + 396 =
5. 5.594 + 495 =
6. 6.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 976: 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.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.396 + 693 =
34. 34.891 + 198 =
35. 35.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.198 + 891 =
40. 40.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?

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