1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 165 · 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 739. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.495 + 594 =
16. 16.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.198 + 891 =
20. 20.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.891 + 198 =
26. 26.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.792 + 297 =
29. 29.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.297 + 792 =
31. 31.Do the 1089 trick with 598: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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