1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 489 · 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 690: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 669: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.495 + 594 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.594 + 495 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.297 + 792 =
10. 10.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.Do the 1089 trick with 885: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Take 980. 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 7. What is that number?
26. 26.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.396 + 693 =
29. 29.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?

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