1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 400 · 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 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 789: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.396 + 693 =
6. 6.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.495 + 594 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.297 + 792 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.198 + 891 =
13. 13.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 255. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
22. 22.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.891 + 198 =
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?

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