1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 663 · 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 782: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.792 + 297 =
4. 4.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 267: 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 3. What is that number?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.693 + 396 =
22. 22.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
28. 28.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.396 + 693 =
36. 36.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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