1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 397 · 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.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 984. 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 6. What is that number?
8. 8.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 832: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.198 + 891 =
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.594 + 495 =
37. 37.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?

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