1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 802 · 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 417. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.396 + 693 =
6. 6.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 980: 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 1. What is that number?
10. 10.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.495 + 594 =
12. 12.297 + 792 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.891 + 198 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.693 + 396 =
20. 20.Take 371. Reverse its digits and take the smaller number away from the bigger one. 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 319: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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