1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 6 · 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 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Take 341. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 925: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.891 + 198 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 799: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 527. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.792 + 297 =
39. 39.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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