1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 192 · 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 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 936: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.495 + 594 =
4. 4.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 498. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.594 + 495 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 772: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
35. 35.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.792 + 297 =
37. 37.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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