1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 102 · 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. 1.792 + 297 =
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.891 + 198 =
13. 13.594 + 495 =
14. 14.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 662. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.495 + 594 =
28. 28.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.198 + 891 =
30. 30.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
40. 40.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?

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