1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 959 · 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 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.792 + 297 =
3. 3.297 + 792 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.891 + 198 =
15. 15.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.594 + 495 =
21. 21.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 489. 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 930: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 427. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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