1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 468 · 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 138: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.495 + 594 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.594 + 495 =
6. 6.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 970. 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.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.693 + 396 =
13. 13.Do the 1089 trick with 572: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. 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.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.396 + 693 =
30. 30.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
40. 40.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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