1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 551 · 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 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.198 + 891 =
8. 8.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.693 + 396 =
15. 15.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 597. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.594 + 495 =
22. 22.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 346: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.891 + 198 =
33. 33.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.495 + 594 =
36. 36.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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