1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 791 · 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.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 561: 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 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Take 638. 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 5. What is that number?
11. 11.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 734: 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 1. What is that number?
16. 16.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.594 + 495 =
18. 18.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.198 + 891 =
20. 20.Do the 1089 trick with 177: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
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 985: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. 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 973: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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