1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 109 · 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. 1.594 + 495 =
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.297 + 792 =
6. 6.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.495 + 594 =
11. 11.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.693 + 396 =
14. 14.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.792 + 297 =
16. 16.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
30. 30.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?

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