1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 680 · 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 966: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.Do the 1089 trick with 568: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.198 + 891 =
14. 14.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.891 + 198 =
23. 23.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.396 + 693 =
26. 26.Do the 1089 trick with 835: 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 2. What is that number?
28. 28.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 378. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 376: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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