1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 880 · 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 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.891 + 198 =
12. 12.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 472: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 244. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.693 + 396 =
25. 25.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.594 + 495 =
32. 32.Do the 1089 trick with 426: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
37. 37.792 + 297 =
38. 38.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?

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