1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 67 · 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 290: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 663: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.Take 183. 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.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.495 + 594 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.891 + 198 =
18. 18.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 335: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.693 + 396 =
21. 21.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.198 + 891 =
23. 23.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.792 + 297 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 197. 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 1. What is that number?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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