1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 327 · 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 548: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.792 + 297 =
6. 6.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.198 + 891 =
15. 15.297 + 792 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.693 + 396 =
26. 26.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.495 + 594 =
35. 35.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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