1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 891 · 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 106: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.198 + 891 =
3. 3.396 + 693 =
4. 4.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.891 + 198 =
7. 7.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 468: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
20. 20.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.297 + 792 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.495 + 594 =
29. 29.792 + 297 =
30. 30.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?

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