1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 991 · 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 299: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.594 + 495 =
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.495 + 594 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.297 + 792 =
26. 26.792 + 297 =
27. 27.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 498: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.396 + 693 =
32. 32.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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