1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 808 · 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.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.693 + 396 =
5. 5.792 + 297 =
6. 6.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.594 + 495 =
18. 18.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.495 + 594 =
22. 22.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 568: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.891 + 198 =
35. 35.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.198 + 891 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
39. 39.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?

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