1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 173 · 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 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.396 + 693 =
3. 3.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.495 + 594 =
5. 5.Take 800. 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 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 427. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 541. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 729. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
35. 35.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?

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