1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 674 · 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 477: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.792 + 297 =
12. 12.Take 238. 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 3. What is that number?
14. 14.594 + 495 =
15. 15.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.693 + 396 =
18. 18.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 896: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 578: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 894: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 205: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 779. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 729. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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