1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 222 · 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. 1.594 + 495 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.495 + 594 =
4. 4.Do the 1089 trick with 730: 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 1. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.396 + 693 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Do the 1089 trick with 193: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.693 + 396 =
24. 24.198 + 891 =
25. 25.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Take 347. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?

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