1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 49 · 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 950: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 114. 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 1. What is that number?
14. 14.198 + 891 =
15. 15.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.594 + 495 =
17. 17.792 + 297 =
18. 18.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.297 + 792 =
23. 23.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 744: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.891 + 198 =
34. 34.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 573: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
39. 39.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.693 + 396 =

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