1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 960 · 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 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 118. 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 1. What is that number?
9. 9.693 + 396 =
10. 10.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.891 + 198 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Do the 1089 trick with 489: 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 3. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.297 + 792 =
18. 18.792 + 297 =
19. 19.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.198 + 891 =
21. 21.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.495 + 594 =
26. 26.Do the 1089 trick with 175: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 630: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 478: 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 2. What is that number?
37. 37.Do the 1089 trick with 368: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 375: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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