1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 473 · 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.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.792 + 297 =
12. 12.693 + 396 =
13. 13.Do the 1089 trick with 842: 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 6. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.297 + 792 =
25. 25.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.198 + 891 =
31. 31.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 447: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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