1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 993 · 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 629: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 698: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.495 + 594 =
7. 7.Do the 1089 trick with 770: 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 8. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 884. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.891 + 198 =
32. 32.Take 347. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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