1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 717 · 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 921: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 920: 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 6. What is that number?
9. 9.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.396 + 693 =
14. 14.495 + 594 =
15. 15.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 750: 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 7. What is that number?
19. 19.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.693 + 396 =
38. 38.594 + 495 =
39. 39.891 + 198 =
40. 40.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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