1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 876 · 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. 1.495 + 594 =
2. 2.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.198 + 891 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.594 + 495 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Take 543. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.693 + 396 =
18. 18.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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