1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 381 · 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 704: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.792 + 297 =
6. 6.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.495 + 594 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 893: 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 5. What is that number?
24. 24.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
39. 39.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 477: reverse and subtract, then reverse that answer and add. What do you get?

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