1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 511 · 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 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.693 + 396 =
4. 4.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.792 + 297 =
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. 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 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Take 457. 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 4. What is that number?
21. 21.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.198 + 891 =
32. 32.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?

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