1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 746 · 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 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.792 + 297 =
9. 9.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 428: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 920. 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 5. What is that number?
34. 34.Do the 1089 trick with 865: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.297 + 792 =
37. 37.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?

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