1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 951 · 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 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 826. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 411: 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 5. What is that number?
14. 14.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.198 + 891 =
19. 19.297 + 792 =
20. 20.594 + 495 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.396 + 693 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
39. 39.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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