1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 561 · 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.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 276. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.297 + 792 =
5. 5.693 + 396 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 779. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 821: 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 2. What is that number?
12. 12.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.396 + 693 =
14. 14.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.891 + 198 =
17. 17.Take 970. 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 6. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 267: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 375. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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