1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 796 · 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. 1.594 + 495 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Do the 1089 trick with 700: 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 2. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 772: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.693 + 396 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 792: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 759. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 745: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 810: 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 5. What is that number?
36. 36.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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