1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 186 · 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 840. 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 4. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 669: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
20. 20.396 + 693 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.495 + 594 =
27. 27.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.198 + 891 =
29. 29.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.297 + 792 =
31. 31.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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