1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 972 · 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 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.396 + 693 =
4. 4.792 + 297 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.495 + 594 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Do the 1089 trick with 960: 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 1. What is that number?
15. 15.693 + 396 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.198 + 891 =
19. 19.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 654: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 856: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 990: 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 7. What is that number?

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