1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 450 · 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.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.594 + 495 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.198 + 891 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.792 + 297 =
19. 19.Take 941. 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 187: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.693 + 396 =
23. 23.891 + 198 =
24. 24.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 378: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 864. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 608. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?

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