1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 825 · 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 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.297 + 792 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
20. 20.495 + 594 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. 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.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.396 + 693 =
29. 29.Do the 1089 trick with 247: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 267. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.693 + 396 =
33. 33.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 568. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.594 + 495 =
40. 40.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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