1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 755 · 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. 1.891 + 198 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. 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. 5.396 + 693 =
6. 6.Do the 1089 trick with 558: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.198 + 891 =
19. 19.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.792 + 297 =
35. 35.495 + 594 =
36. 36.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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