1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 525 · 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 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.495 + 594 =
12. 12.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 983: 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 2. What is that number?
17. 17.Take 276. 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 6. What is that number?
19. 19.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.396 + 693 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.Take 468. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.792 + 297 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.297 + 792 =
37. 37.Do the 1089 trick with 498: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.891 + 198 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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