1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 859 · 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 912: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. 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. 5.495 + 594 =
6. 6.198 + 891 =
7. 7.Take 662. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 870. 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 8. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 957. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 799: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.396 + 693 =
32. 32.891 + 198 =
33. 33.Do the 1089 trick with 658: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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