1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 422 · 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. 1.792 + 297 =
2. 2.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 688: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 678: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.396 + 693 =
17. 17.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.891 + 198 =
21. 21.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 348: 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 2. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?

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