1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 927 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.396 + 693 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.495 + 594 =
18. 18.198 + 891 =
19. 19.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. 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 780: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.297 + 792 =
32. 32.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
39. 39.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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