1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 930 · 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 1. What is that number?
2. 2.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Take 754. 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 7. What is that number?
9. 9.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 498. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.495 + 594 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.297 + 792 =
23. 23.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.594 + 495 =
26. 26.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.891 + 198 =
33. 33.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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