1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 515 · 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 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 325: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.693 + 396 =
11. 11.297 + 792 =
12. 12.495 + 594 =
13. 13.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 336: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 517. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 810. 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 8. What is that number?
19. 19.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.594 + 495 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.198 + 891 =
35. 35.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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