1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 239 · 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 823: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
6. 6.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.396 + 693 =
9. 9.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.594 + 495 =
12. 12.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 378: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 971: 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 7. What is that number?

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