1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 614 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.495 + 594 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.792 + 297 =
30. 30.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?

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