1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 342 · 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 663: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 832: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.198 + 891 =
11. 11.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Do the 1089 trick with 248: 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 3. What is that number?
27. 27.396 + 693 =
28. 28.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.891 + 198 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 930. 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 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?

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