1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 812 · 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 924: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.792 + 297 =
3. 3.594 + 495 =
4. 4.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 385: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 915. 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 6. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.297 + 792 =
17. 17.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.396 + 693 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.495 + 594 =
25. 25.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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