1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 127 · 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. 1.495 + 594 =
2. 2.Do the 1089 trick with 388: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.792 + 297 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.396 + 693 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.297 + 792 =
8. 8.Do the 1089 trick with 246: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.198 + 891 =
17. 17.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.891 + 198 =
23. 23.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 930. 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.Do the 1089 trick with 427: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.693 + 396 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
33. 33.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.594 + 495 =
37. 37.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?

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