1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 829 · 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 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 961. Reverse its digits and take the smaller number away from the bigger one. 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 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 642: 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 2. What is that number?
13. 13.792 + 297 =
14. 14.198 + 891 =
15. 15.Take 840. 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 5. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 270. 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 1. What is that number?
30. 30.Do the 1089 trick with 481: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 739. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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