1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 178 · 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 471. 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 1. What is that number?
3. 3.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
6. 6.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.693 + 396 =
22. 22.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.891 + 198 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.495 + 594 =
31. 31.396 + 693 =
32. 32.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.792 + 297 =
35. 35.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
38. 38.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?

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