1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 18 · 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. 1.198 + 891 =
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.396 + 693 =
20. 20.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 188. 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 3. What is that number?
23. 23.Do the 1089 trick with 244: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.891 + 198 =
28. 28.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
36. 36.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.792 + 297 =
40. 40.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?

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