1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 909 · 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. 1.792 + 297 =
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Take 370. 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 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.495 + 594 =
15. 15.693 + 396 =
16. 16.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.594 + 495 =
21. 21.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 300. 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 3. What is that number?
27. 27.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 355: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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