1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 627 · 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 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.Do the 1089 trick with 597: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 954: 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 7. What is that number?
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 719: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 104: 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 6. What is that number?
26. 26.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 247: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 658: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.792 + 297 =

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