1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 547 · 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 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.693 + 396 =
7. 7.891 + 198 =
8. 8.495 + 594 =
9. 9.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 853: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 765. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.594 + 495 =
26. 26.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.Do the 1089 trick with 679: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.792 + 297 =
37. 37.396 + 693 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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