1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 868 · 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 472: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.693 + 396 =
9. 9.Do the 1089 trick with 447: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 482: 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. 12.495 + 594 =
13. 13.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 380: 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 4. What is that number?
22. 22.891 + 198 =
23. 23.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.594 + 495 =
26. 26.297 + 792 =
27. 27.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 793: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. 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.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.198 + 891 =
36. 36.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.792 + 297 =
39. 39.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?

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