1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 343 · 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 694: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.594 + 495 =
3. 3.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 658: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.396 + 693 =
9. 9.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 833: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.891 + 198 =
12. 12.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.297 + 792 =
14. 14.792 + 297 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.495 + 594 =
17. 17.198 + 891 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 880: 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 4. What is that number?
22. 22.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.693 + 396 =
34. 34.Do the 1089 trick with 840: 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 1. What is that number?
36. 36.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?

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