1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 544 · 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 109: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.495 + 594 =
12. 12.891 + 198 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.198 + 891 =
17. 17.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.693 + 396 =
19. 19.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 936: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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