1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 978 · 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 990: 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 8. What is that number?
3. 3.495 + 594 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. 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. 7.792 + 297 =
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 447. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.396 + 693 =
14. 14.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 806. 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 2. What is that number?
19. 19.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.594 + 495 =
24. 24.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.693 + 396 =
26. 26.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.297 + 792 =
34. 34.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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