1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 460 · 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 7. What is that number?
2. 2.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.495 + 594 =
7. 7.693 + 396 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 834: 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 8. What is that number?
12. 12.297 + 792 =
13. 13.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.891 + 198 =
15. 15.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.198 + 891 =
23. 23.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 742. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.396 + 693 =

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