1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 318 · 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 167: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Do the 1089 trick with 541: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.594 + 495 =
7. 7.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.495 + 594 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.297 + 792 =
19. 19.891 + 198 =
20. 20.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.198 + 891 =
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Take 400. 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 5. What is that number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.693 + 396 =
34. 34.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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