1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 598 · 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. 1.891 + 198 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.693 + 396 =
6. 6.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.396 + 693 =
15. 15.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.495 + 594 =
17. 17.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 547: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.297 + 792 =
23. 23.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 598. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 269. 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 6. What is that number?
29. 29.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
34. 34.Do the 1089 trick with 487: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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