1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 702 · 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 226: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.396 + 693 =
11. 11.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.495 + 594 =
14. 14.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.297 + 792 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
26. 26.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.594 + 495 =
31. 31.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.693 + 396 =
37. 37.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
40. 40.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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