1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 800 · 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.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 355: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 229: 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.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.594 + 495 =
19. 19.Take 592. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.396 + 693 =
25. 25.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.792 + 297 =
28. 28.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 145. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?

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