1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 384 · 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 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 541. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 498: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.693 + 396 =
19. 19.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.792 + 297 =
22. 22.396 + 693 =
23. 23.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 568: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.891 + 198 =
38. 38.Do the 1089 trick with 856: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
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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