1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 672 · 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.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.891 + 198 =
10. 10.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.198 + 891 =
14. 14.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 355: 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 5. What is that number?
28. 28.297 + 792 =
29. 29.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.495 + 594 =
32. 32.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 991. 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 2. What is that number?
40. 40.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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