1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 78 · 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 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.396 + 693 =
6. 6.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.594 + 495 =
9. 9.Take 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 240. 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 3. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 811. 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 5. What is that number?
17. 17.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 794: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 235: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.198 + 891 =
27. 27.Do the 1089 trick with 318: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
29. 29.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.792 + 297 =
38. 38.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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