1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 637 · 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.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.198 + 891 =
26. 26.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 521: 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 3. 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.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?

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