1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 399 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.198 + 891 =
3. 3.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.891 + 198 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
27. 27.Take 755. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 274: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.297 + 792 =
35. 35.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.792 + 297 =
37. 37.594 + 495 =
38. 38.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.396 + 693 =

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