1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 798 · 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. 1.396 + 693 =
2. 2.Do the 1089 trick with 308: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 846: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 940. 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 5. What is that number?
10. 10.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.594 + 495 =
14. 14.Do the 1089 trick with 678: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 896. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.693 + 396 =
23. 23.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.891 + 198 =
25. 25.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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