1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 144 · 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. 1.396 + 693 =
2. 2.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.693 + 396 =
4. 4.594 + 495 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.Take 759. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.891 + 198 =
19. 19.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 652: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.297 + 792 =
33. 33.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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