1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 881 · 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 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.792 + 297 =
17. 17.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 368: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.495 + 594 =
23. 23.198 + 891 =
24. 24.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.396 + 693 =
26. 26.Take 548. 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 6. What is that number?
28. 28.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.297 + 792 =
40. 40.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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