1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 822 · 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 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.594 + 495 =
6. 6.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.198 + 891 =
9. 9.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.297 + 792 =
11. 11.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Take 673. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 846. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.396 + 693 =
24. 24.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 345: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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