1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 175 · 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 863: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.693 + 396 =
4. 4.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.594 + 495 =
13. 13.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.396 + 693 =
24. 24.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.198 + 891 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.Do the 1089 trick with 456: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.495 + 594 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
39. 39.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?

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