1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 641 · 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. 1.198 + 891 =
2. 2.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.396 + 693 =
16. 16.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.297 + 792 =
21. 21.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
24. 24.792 + 297 =
25. 25.891 + 198 =
26. 26.693 + 396 =
27. 27.Do the 1089 trick with 265: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 703: 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 5. What is that number?
32. 32.594 + 495 =
33. 33.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 753. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 517: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.495 + 594 =
38. 38.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?

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