1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 149 · 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.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.396 + 693 =
9. 9.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 854: 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.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
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 1. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Take 901. 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 2. What is that number?
24. 24.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.594 + 495 =
35. 35.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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