1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 538 · 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 174: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.Do the 1089 trick with 406: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.891 + 198 =
8. 8.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.396 + 693 =
19. 19.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Do the 1089 trick with 227: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.693 + 396 =
23. 23.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Do the 1089 trick with 297: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 349: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.792 + 297 =

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