1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 721 · 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.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.792 + 297 =
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 268: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.495 + 594 =
7. 7.Do the 1089 trick with 750: 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.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.396 + 693 =
11. 11.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 341. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 169: 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 1. What is that number?
18. 18.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 840. 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 8. What is that number?
21. 21.198 + 891 =
22. 22.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 340. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 604: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.891 + 198 =
38. 38.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?

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