1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 689 · 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.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.891 + 198 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.495 + 594 =
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.396 + 693 =
33. 33.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.693 + 396 =
35. 35.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.792 + 297 =
39. 39.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?

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