1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 136 · 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. 1.198 + 891 =
2. 2.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.594 + 495 =
6. 6.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.297 + 792 =
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 990: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.495 + 594 =
15. 15.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.891 + 198 =
26. 26.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.693 + 396 =
31. 31.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 466: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 567: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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