1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 124 · 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 782. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.297 + 792 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 824. 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 7. What is that number?
31. 31.594 + 495 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?

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