1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 569 · 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 551: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.396 + 693 =
6. 6.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.594 + 495 =
16. 16.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 754. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 810. 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 5. What is that number?
21. 21.792 + 297 =
22. 22.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.891 + 198 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.693 + 396 =
32. 32.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.198 + 891 =
37. 37.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?

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