1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 435 · 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. 1.891 + 198 =
2. 2.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 874: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 428: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.396 + 693 =
26. 26.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.495 + 594 =
31. 31.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?

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