1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 395 · 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 710: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.297 + 792 =
6. 6.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.594 + 495 =
11. 11.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.792 + 297 =
21. 21.693 + 396 =
22. 22.495 + 594 =
23. 23.891 + 198 =
24. 24.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. 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.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 488. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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