1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 788 · 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. 1.396 + 693 =
2. 2.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.297 + 792 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 896. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 235. 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 449: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 833: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.693 + 396 =
25. 25.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Do the 1089 trick with 983: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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