1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 999 · 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 628: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 698: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 679: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.198 + 891 =
24. 24.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 834: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 458: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.297 + 792 =
33. 33.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.Take 537. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
40. 40.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?

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