1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 952 · 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 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 901. 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 6. What is that number?
4. 4.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 910. 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. 11.297 + 792 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.594 + 495 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 860: 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 2. What is that number?
21. 21.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.891 + 198 =
24. 24.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.396 + 693 =
29. 29.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 658. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.693 + 396 =

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