1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 928 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. 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.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 749: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.792 + 297 =
14. 14.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 569: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.396 + 693 =
26. 26.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.198 + 891 =
31. 31.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.891 + 198 =
34. 34.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.594 + 495 =
37. 37.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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