1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 872 · 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 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.396 + 693 =
7. 7.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 469. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
20. 20.Take 189. 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 4. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.495 + 594 =
31. 31.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.693 + 396 =
37. 37.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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