1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 574 · 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. 1.396 + 693 =
2. 2.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.891 + 198 =
9. 9.495 + 594 =
10. 10.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 441. 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 5. What is that number?
13. 13.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.693 + 396 =
21. 21.297 + 792 =
22. 22.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 570. 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 6. What is that number?
26. 26.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 348. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 610. 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 3. What is that number?
35. 35.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 539. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 833: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?

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