1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 92 · 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 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.396 + 693 =
5. 5.297 + 792 =
6. 6.594 + 495 =
7. 7.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.792 + 297 =
19. 19.Do the 1089 trick with 315: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.198 + 891 =
22. 22.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Do the 1089 trick with 457: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.891 + 198 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.495 + 594 =
34. 34.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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