1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 245 · 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 910: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.594 + 495 =
3. 3.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.891 + 198 =
10. 10.198 + 891 =
11. 11.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.693 + 396 =
17. 17.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.495 + 594 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.396 + 693 =
28. 28.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.792 + 297 =
32. 32.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
35. 35.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 587. 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. 39.297 + 792 =
40. 40.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?

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