1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 897 · 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. 1.693 + 396 =
2. 2.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.495 + 594 =
6. 6.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 622: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.792 + 297 =
9. 9.891 + 198 =
10. 10.Take 820. 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 5. What is that number?
12. 12.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 456. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 941. Reverse its digits and take the smaller number away from the bigger one. 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.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.198 + 891 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
37. 37.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 297: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 598. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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