1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 871 · 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.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.396 + 693 =
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.Do the 1089 trick with 375: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.594 + 495 =
18. 18.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.693 + 396 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.198 + 891 =
27. 27.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.792 + 297 =
36. 36.Do the 1089 trick with 571: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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