1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 323 · 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 412: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.495 + 594 =
3. 3.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Take 870. 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 1. What is that number?
7. 7.297 + 792 =
8. 8.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 904: 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 5. What is that number?
11. 11.693 + 396 =
12. 12.594 + 495 =
13. 13.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 341: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 639. 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 4. What is that number?
28. 28.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.891 + 198 =
35. 35.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?

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