1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 664 · 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 530: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.198 + 891 =
10. 10.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.693 + 396 =
12. 12.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.396 + 693 =
15. 15.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.891 + 198 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 145. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.Take 960. 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 7. What is that number?
34. 34.Take 489. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.495 + 594 =
40. 40.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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