1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 986 · 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 510: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.495 + 594 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 765. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 894: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?

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