1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 268 · 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. 1.198 + 891 =
2. 2.Take 870. 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 1. What is that number?
4. 4.396 + 693 =
5. 5.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 188. 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 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.594 + 495 =
10. 10.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 412: 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 6. What is that number?
14. 14.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.693 + 396 =
17. 17.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 551. 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 4. What is that number?
20. 20.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 124. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.891 + 198 =
26. 26.Do the 1089 trick with 329: 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 7. What is that number?
28. 28.297 + 792 =
29. 29.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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