1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 476 · 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 155: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. 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 250: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.891 + 198 =
17. 17.594 + 495 =
18. 18.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.693 + 396 =
22. 22.297 + 792 =
23. 23.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
33. 33.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 176. 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 8. What is that number?
37. 37.495 + 594 =
38. 38.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 276. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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