1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 901 · 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. 1.198 + 891 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.594 + 495 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.693 + 396 =
14. 14.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 691. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.396 + 693 =
22. 22.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 598: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 368: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.792 + 297 =
34. 34.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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