1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 607 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
2. 2.891 + 198 =
3. 3.297 + 792 =
4. 4.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.594 + 495 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 800: 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 880: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Take 987. 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 4. What is that number?
17. 17.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 520. 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 3. What is that number?
24. 24.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 944: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.396 + 693 =
30. 30.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
40. 40.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?

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