1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 262 · 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. 1.396 + 693 =
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.792 + 297 =
8. 8.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.594 + 495 =
17. 17.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.693 + 396 =
19. 19.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 507: 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.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 376: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.891 + 198 =
32. 32.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
37. 37.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?

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