1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 415 · 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 370. 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 6. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.396 + 693 =
24. 24.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.594 + 495 =
33. 33.297 + 792 =
34. 34.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.198 + 891 =
36. 36.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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