1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 887 · 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 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.594 + 495 =
6. 6.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 972: 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 3. What is that number?
9. 9.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.Do the 1089 trick with 654: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.396 + 693 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.495 + 594 =
25. 25.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Take 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.891 + 198 =
33. 33.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
39. 39.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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