1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 129 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.396 + 693 =
6. 6.693 + 396 =
7. 7.792 + 297 =
8. 8.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.297 + 792 =
11. 11.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.198 + 891 =
18. 18.Do the 1089 trick with 890: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 864. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 472. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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