1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 902 · 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 2. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.198 + 891 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.792 + 297 =
13. 13.693 + 396 =
14. 14.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.891 + 198 =
17. 17.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.495 + 594 =
19. 19.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.Do the 1089 trick with 327: 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 7. What is that number?
26. 26.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.594 + 495 =
32. 32.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.396 + 693 =
35. 35.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?

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