1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 346 · 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 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.693 + 396 =
4. 4.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 537: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 735: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 174: 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 5. What is that number?
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 813. 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 2. What is that number?
16. 16.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.792 + 297 =
20. 20.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 107: 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 6. What is that number?
26. 26.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 970: 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 4. What is that number?
34. 34.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.Do the 1089 trick with 345: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.297 + 792 =
39. 39.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?

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