1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 12 · 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 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.297 + 792 =
9. 9.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.792 + 297 =
11. 11.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.594 + 495 =
16. 16.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.495 + 594 =
36. 36.891 + 198 =
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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