1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 183 · 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 471: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 458: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 836: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.495 + 594 =
9. 9.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.792 + 297 =
11. 11.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 832. 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 1. What is that number?
14. 14.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.693 + 396 =
21. 21.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
28. 28.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 772: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.396 + 693 =
37. 37.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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