1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 961 · 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 165: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.297 + 792 =
9. 9.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 208: 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 2. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.198 + 891 =
16. 16.Take 699. 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.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.891 + 198 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.594 + 495 =
34. 34.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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