1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 552 · 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 539: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.693 + 396 =
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 468. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 629. 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 2. What is that number?
19. 19.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
25. 25.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.495 + 594 =
27. 27.297 + 792 =
28. 28.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.891 + 198 =
30. 30.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 702. 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 7. What is that number?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.594 + 495 =

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