1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 91 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.198 + 891 =
7. 7.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 893. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.396 + 693 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.891 + 198 =
22. 22.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 500: 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.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Do the 1089 trick with 528: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.693 + 396 =
37. 37.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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