1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 998 · 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 408: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.495 + 594 =
3. 3.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. 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 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.396 + 693 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 806. 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 2. What is that number?
20. 20.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.693 + 396 =
25. 25.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 853: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
30. 30.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.198 + 891 =
34. 34.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.891 + 198 =
37. 37.Do the 1089 trick with 669: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?

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