1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 409 · 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.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.396 + 693 =
4. 4.Do the 1089 trick with 755: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.891 + 198 =
15. 15.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.693 + 396 =
19. 19.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 912: 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 8. What is that number?
22. 22.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.198 + 891 =
27. 27.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.792 + 297 =
30. 30.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.594 + 495 =
33. 33.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.297 + 792 =
35. 35.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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