1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 199 · 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 220: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.198 + 891 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.297 + 792 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.594 + 495 =
15. 15.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 780. 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 4. What is that number?
18. 18.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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