1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 915 · 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 910: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 256: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 296. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 673. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 488. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.792 + 297 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 843: 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 4. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?

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