1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 723 · 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 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.297 + 792 =
6. 6.693 + 396 =
7. 7.Take 710. 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 2. What is that number?
9. 9.Do the 1089 trick with 571: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.891 + 198 =
14. 14.594 + 495 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 437: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.792 + 297 =
28. 28.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.495 + 594 =
31. 31.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.198 + 891 =
33. 33.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.396 + 693 =
35. 35.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 541: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 489. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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