1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 513 · 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 350. 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 4. What is that number?
3. 3.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 684: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.396 + 693 =
13. 13.198 + 891 =
14. 14.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.594 + 495 =
18. 18.495 + 594 =
19. 19.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Do the 1089 trick with 266: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.297 + 792 =
26. 26.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 803. 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 6. What is that number?
32. 32.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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