1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 141 · 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 8. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.297 + 792 =
5. 5.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.198 + 891 =
17. 17.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.594 + 495 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. 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 429: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Take 957. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?

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