1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 371 · 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 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 850. 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 6. What is that number?
5. 5.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.693 + 396 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 237: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.Do the 1089 trick with 359: 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 2. What is that number?
15. 15.Take 539. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 427: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 753. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.396 + 693 =
22. 22.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.198 + 891 =
27. 27.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.594 + 495 =
34. 34.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.495 + 594 =
36. 36.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
39. 39.Do the 1089 trick with 431: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.891 + 198 =

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