1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 728 · 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. 1.396 + 693 =
2. 2.693 + 396 =
3. 3.495 + 594 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.297 + 792 =
9. 9.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.891 + 198 =
13. 13.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.792 + 297 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 236: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.594 + 495 =
40. 40.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?

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