1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 775 · 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. 1.297 + 792 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.693 + 396 =
4. 4.Do the 1089 trick with 754: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 952. 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 1. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.495 + 594 =
28. 28.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.792 + 297 =
37. 37.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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