1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 345 · 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 982: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 316. 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 530: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.693 + 396 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.297 + 792 =
16. 16.396 + 693 =
17. 17.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.594 + 495 =
19. 19.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 270. 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 1. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.792 + 297 =
24. 24.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 956: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 597. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
33. 33.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 854. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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