1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 143 · 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 731: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.693 + 396 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
20. 20.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
24. 24.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.792 + 297 =
33. 33.Do the 1089 trick with 674: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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