1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 643 · 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 860. 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.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 537. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 593: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.891 + 198 =
30. 30.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.594 + 495 =
32. 32.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
38. 38.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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