1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 326 · 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 274: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 115: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.891 + 198 =
8. 8.297 + 792 =
9. 9.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.495 + 594 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.594 + 495 =
28. 28.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 904: 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 3. What is that number?

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