1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 936 · 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 3. What is that number?
2. 2.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.792 + 297 =
13. 13.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.198 + 891 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.495 + 594 =
18. 18.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.594 + 495 =
29. 29.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.891 + 198 =
32. 32.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.396 + 693 =
35. 35.297 + 792 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
37. 37.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 214: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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