1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 231 · 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 260: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 900. 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 7. What is that number?
5. 5.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 793: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 672: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.891 + 198 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.495 + 594 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 990. Reverse its digits and take the smaller number away from the bigger one. 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 592. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 244: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 632: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.396 + 693 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Take 658. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?

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