1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 553 · 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. 1.396 + 693 =
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.792 + 297 =
5. 5.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.198 + 891 =
8. 8.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 351. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.594 + 495 =
17. 17.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.693 + 396 =
22. 22.495 + 594 =
23. 23.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
29. 29.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 341: reverse and subtract, then reverse that answer and add. What do you get?

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