1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 266 · 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.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.693 + 396 =
11. 11.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 341. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.198 + 891 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.594 + 495 =
17. 17.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.396 + 693 =
19. 19.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 679: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 470: 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 8. What is that number?

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