1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 774 · 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.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.Take 239. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.792 + 297 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.396 + 693 =
14. 14.198 + 891 =
15. 15.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 779. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 277: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.495 + 594 =
35. 35.297 + 792 =
36. 36.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 305: 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 7. What is that number?

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