1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 954 · 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. 1.693 + 396 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.594 + 495 =
4. 4.891 + 198 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 325: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 315: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 489. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 234: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 679. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.396 + 693 =
37. 37.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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