1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 864 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.396 + 693 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 427: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 133: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.594 + 495 =
13. 13.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.198 + 891 =
20. 20.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.693 + 396 =
24. 24.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 648: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.495 + 594 =

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