1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 882 · 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.Do the 1089 trick with 932: 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 2. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 642: 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. 9.198 + 891 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.693 + 396 =
21. 21.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.594 + 495 =
23. 23.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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