1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 374 · 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 927: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 447: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 276. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 348. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.594 + 495 =
16. 16.Take 300. 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 5. What is that number?
18. 18.891 + 198 =
19. 19.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.693 + 396 =
22. 22.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.396 + 693 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.297 + 792 =
39. 39.Do the 1089 trick with 930: 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 8. What is that number?

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