1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 744 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
2. 2.198 + 891 =
3. 3.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.594 + 495 =
12. 12.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.693 + 396 =
20. 20.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.495 + 594 =
26. 26.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.792 + 297 =
39. 39.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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