1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 269 · 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. 1.297 + 792 =
2. 2.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.792 + 297 =
17. 17.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 800. 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 8. What is that number?
20. 20.Take 480. 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 3. What is that number?
22. 22.495 + 594 =
23. 23.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Take 660. 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 1. What is that number?
28. 28.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?

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