1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 152 · 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.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.693 + 396 =
10. 10.198 + 891 =
11. 11.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.Take 759. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.891 + 198 =
27. 27.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?

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