1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 973 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 229: 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 3. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.495 + 594 =
9. 9.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.198 + 891 =
12. 12.693 + 396 =
13. 13.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.396 + 693 =
15. 15.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 590. 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 6. What is that number?
21. 21.Do the 1089 trick with 678: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Take 691. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 598: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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