1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 921 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
2. 2.792 + 297 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.297 + 792 =
14. 14.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.693 + 396 =
17. 17.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 759. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.198 + 891 =
24. 24.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?

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