1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 429 · 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. 1.594 + 495 =
2. 2.Take 910. 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 397: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.297 + 792 =
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.693 + 396 =
12. 12.792 + 297 =
13. 13.891 + 198 =
14. 14.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.396 + 693 =
21. 21.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.495 + 594 =
26. 26.Take 911. 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 5. What is that number?
28. 28.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?

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