1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 500 · 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 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.891 + 198 =
6. 6.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 338. Reverse its digits and take the smaller number away from the bigger one. 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. 15.396 + 693 =
16. 16.Do the 1089 trick with 846: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.297 + 792 =
21. 21.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 491: 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 6. What is that number?
24. 24.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.792 + 297 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Take 870. 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 3. What is that number?
34. 34.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.693 + 396 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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