1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 768 · 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. 1.792 + 297 =
2. 2.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.891 + 198 =
10. 10.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.297 + 792 =
17. 17.198 + 891 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 583: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.495 + 594 =

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