1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 795 · 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 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 227: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.891 + 198 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 498. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 900. 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 6. What is that number?
35. 35.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
40. 40.Take 649. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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