1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 615 · 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. 1.297 + 792 =
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 945: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.198 + 891 =
12. 12.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.495 + 594 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
16. 16.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 432. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Do the 1089 trick with 254: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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