1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 407 · 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 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.Do the 1089 trick with 266: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 970. 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 3. What is that number?
8. 8.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 447. 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 4. What is that number?
12. 12.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.891 + 198 =
19. 19.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.792 + 297 =
27. 27.Do the 1089 trick with 215: 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 5. What is that number?
29. 29.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 803. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 456: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.198 + 891 =
36. 36.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.297 + 792 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?

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