1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 651 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.792 + 297 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.594 + 495 =
16. 16.198 + 891 =
17. 17.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 950: 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 3. What is that number?
29. 29.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.891 + 198 =
33. 33.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 739. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?

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