1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 403 · 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.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.891 + 198 =
3. 3.396 + 693 =
4. 4.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.Do the 1089 trick with 456: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 664: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.495 + 594 =
17. 17.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.594 + 495 =
19. 19.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 540: 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 3. What is that number?
24. 24.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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