1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 436 · 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. 1.891 + 198 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.495 + 594 =
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 624: 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.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.396 + 693 =
25. 25.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 990. 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 2. What is that number?
30. 30.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 481: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.693 + 396 =
34. 34.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
39. 39.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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