1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 66 · 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 543: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.495 + 594 =
4. 4.Take 893. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.198 + 891 =
8. 8.792 + 297 =
9. 9.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.396 + 693 =
16. 16.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.891 + 198 =
21. 21.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 730: 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 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 683: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.594 + 495 =

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