1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 302 · 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 418: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 911: 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 7. What is that number?
9. 9.891 + 198 =
10. 10.Take 719. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 163: 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 2. What is that number?
14. 14.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.297 + 792 =
18. 18.594 + 495 =
19. 19.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.792 + 297 =
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 250: 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 4. What is that number?
28. 28.Take 255. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 200: 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 3. What is that number?
35. 35.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 460. 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 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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