1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 742 · 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 880: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.396 + 693 =
13. 13.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 755. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 209: 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 6. What is that number?
27. 27.Take 865. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.792 + 297 =
31. 31.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 348. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
35. 35.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.198 + 891 =
39. 39.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?

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