1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 64 · 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 670: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.198 + 891 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.594 + 495 =
12. 12.792 + 297 =
13. 13.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.495 + 594 =
16. 16.Take 166. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 543. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
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 254: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.891 + 198 =
30. 30.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.297 + 792 =
33. 33.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 461: 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 3. What is that number?
40. 40.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?

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