1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 433 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.594 + 495 =
7. 7.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.495 + 594 =
26. 26.198 + 891 =
27. 27.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Do the 1089 trick with 255: 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 8. What is that number?
33. 33.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 409: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
40. 40.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?

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