1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 662 · 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 577: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.198 + 891 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.495 + 594 =
18. 18.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.594 + 495 =
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 368: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.792 + 297 =
33. 33.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 116. 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 1. What is that number?
38. 38.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?

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