1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 17 · 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 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.396 + 693 =
7. 7.594 + 495 =
8. 8.792 + 297 =
9. 9.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.891 + 198 =
14. 14.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 673. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 597: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 753. 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.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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