1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 970 · 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 208: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Do the 1089 trick with 910: 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 6. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.693 + 396 =
8. 8.297 + 792 =
9. 9.891 + 198 =
10. 10.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.396 + 693 =
16. 16.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 175: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.495 + 594 =
20. 20.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.594 + 495 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.198 + 891 =
27. 27.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.792 + 297 =

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