1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 772 · 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. 1.297 + 792 =
2. 2.198 + 891 =
3. 3.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.792 + 297 =
7. 7.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.891 + 198 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.594 + 495 =
13. 13.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 558: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 970: 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 3. What is that number?
20. 20.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 256. 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 2. What is that number?
25. 25.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 678: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 349: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.693 + 396 =
37. 37.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?

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