1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 968 · 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 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.594 + 495 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.891 + 198 =
11. 11.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.792 + 297 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.297 + 792 =
19. 19.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 589: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 658. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.495 + 594 =
35. 35.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 980. 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 6. What is that number?
38. 38.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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