1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 263 · 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 688: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.792 + 297 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 698: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 257: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.693 + 396 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.396 + 693 =
23. 23.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.495 + 594 =
25. 25.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.891 + 198 =
28. 28.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 488: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
33. 33.594 + 495 =
34. 34.297 + 792 =
35. 35.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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