1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 591 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.198 + 891 =
7. 7.396 + 693 =
8. 8.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.495 + 594 =
13. 13.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.594 + 495 =
30. 30.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 927: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.891 + 198 =
35. 35.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?

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