1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 62 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.396 + 693 =
7. 7.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.891 + 198 =
25. 25.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 710. 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 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.495 + 594 =
35. 35.Do the 1089 trick with 115: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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