1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 945 · 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. 1.198 + 891 =
2. 2.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.297 + 792 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 976: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 663: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.396 + 693 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
28. 28.Do the 1089 trick with 227: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.693 + 396 =
33. 33.792 + 297 =
34. 34.594 + 495 =
35. 35.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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