1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 950 · 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.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 705: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.297 + 792 =
5. 5.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.891 + 198 =
24. 24.198 + 891 =
25. 25.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.396 + 693 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
40. 40.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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