1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 869 · 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 209: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.396 + 693 =
4. 4.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.891 + 198 =
14. 14.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.198 + 891 =
16. 16.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.594 + 495 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.693 + 396 =
29. 29.Do the 1089 trick with 115: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 522. 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 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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