1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 427 · 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.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 603: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 349: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.396 + 693 =
12. 12.891 + 198 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.495 + 594 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.594 + 495 =
20. 20.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.693 + 396 =
24. 24.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.792 + 297 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
35. 35.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.198 + 891 =
39. 39.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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