1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 665 · 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 114: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.495 + 594 =
3. 3.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 578: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.297 + 792 =
14. 14.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Take 169. 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 6. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.198 + 891 =
35. 35.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?

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