1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 470 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.396 + 693 =
6. 6.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.594 + 495 =
10. 10.495 + 594 =
11. 11.Take 518. 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 3. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.792 + 297 =
15. 15.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 581. Reverse its digits and take the smaller number away from the bigger one. 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.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 843. 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 6. What is that number?
31. 31.Do the 1089 trick with 185: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.891 + 198 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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