1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 900 · 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 159: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.693 + 396 =
4. 4.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.891 + 198 =
25. 25.198 + 891 =
26. 26.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.792 + 297 =
34. 34.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.297 + 792 =
37. 37.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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