1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 278 · 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. 1.198 + 891 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.792 + 297 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 569: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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