1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 416 · 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 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 762: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
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 128: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 580: 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 7. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.891 + 198 =
18. 18.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.693 + 396 =
26. 26.Do the 1089 trick with 896: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 539. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.198 + 891 =
39. 39.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?

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