1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 857 · 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 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 790: 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 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.495 + 594 =
13. 13.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.198 + 891 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.297 + 792 =
28. 28.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.792 + 297 =
30. 30.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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