1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 59 · 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 517: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.792 + 297 =
7. 7.891 + 198 =
8. 8.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Do the 1089 trick with 113: 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 7. What is that number?
14. 14.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.396 + 693 =
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
33. 33.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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