1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 671 · 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. 1.594 + 495 =
2. 2.396 + 693 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 619: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.891 + 198 =
16. 16.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Take 930. 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 3. What is that number?
21. 21.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.297 + 792 =
39. 39.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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