1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 320 · 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 7. What is that number?
2. 2.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 633: 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 2. What is that number?
12. 12.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 861: 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 8. What is that number?
15. 15.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 911: 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 3. What is that number?
26. 26.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.891 + 198 =
34. 34.396 + 693 =
35. 35.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.495 + 594 =
38. 38.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?

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