1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 497 · 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 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.396 + 693 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.297 + 792 =
5. 5.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.594 + 495 =
8. 8.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.198 + 891 =
17. 17.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 901: 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 4. What is that number?
23. 23.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?

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