1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 333 · 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. 1.198 + 891 =
2. 2.Do the 1089 trick with 431: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.792 + 297 =
5. 5.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.Do the 1089 trick with 955: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.297 + 792 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.693 + 396 =
16. 16.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.495 + 594 =
23. 23.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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