1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 987 · 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 930: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.594 + 495 =
4. 4.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 976: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Do the 1089 trick with 341: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.792 + 297 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.495 + 594 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.198 + 891 =
19. 19.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.693 + 396 =
25. 25.Do the 1089 trick with 604: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 246. 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 4. What is that number?
28. 28.297 + 792 =
29. 29.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 227: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 519: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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