1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 224 · 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 308: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.891 + 198 =
3. 3.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 920. 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 4. What is that number?
9. 9.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.Take 729. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.495 + 594 =
28. 28.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.297 + 792 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 990: 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 7. What is that number?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?

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