1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 858 · 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 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.396 + 693 =
4. 4.Do the 1089 trick with 664: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 254. 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 1. What is that number?
10. 10.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.198 + 891 =
13. 13.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.594 + 495 =
25. 25.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.792 + 297 =
39. 39.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?

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