1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 25 · 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 630. 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 6. What is that number?
3. 3.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.693 + 396 =
6. 6.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.396 + 693 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 259: 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 5. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.495 + 594 =
24. 24.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.792 + 297 =
37. 37.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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