1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 988 · 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 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 669: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 603: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.693 + 396 =
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.198 + 891 =
33. 33.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 648: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 901. 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. 37.495 + 594 =
38. 38.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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