1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 370 · 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 799: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.297 + 792 =
14. 14.Take 117. 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. 16.594 + 495 =
17. 17.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 650. 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 932: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.198 + 891 =
30. 30.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
33. 33.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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