1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 753 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 792: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.297 + 792 =
14. 14.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.396 + 693 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.693 + 396 =
23. 23.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 854. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.198 + 891 =
37. 37.Do the 1089 trick with 896: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?

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