1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 238 · 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. 1.495 + 594 =
2. 2.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.891 + 198 =
9. 9.396 + 693 =
10. 10.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 348: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Take 669. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.Take 563. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.297 + 792 =

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