1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 861 · 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 512: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.396 + 693 =
4. 4.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 773: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 941: 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 6. 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.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.594 + 495 =
24. 24.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.693 + 396 =
32. 32.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.891 + 198 =
36. 36.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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