1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 714 · 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 367. 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 3. What is that number?
3. 3.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.693 + 396 =
6. 6.792 + 297 =
7. 7.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.198 + 891 =
12. 12.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 947. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.495 + 594 =
26. 26.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.396 + 693 =
30. 30.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 759. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.297 + 792 =
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Do the 1089 trick with 315: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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