1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 23 · 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.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.396 + 693 =
4. 4.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.594 + 495 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.792 + 297 =
10. 10.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.198 + 891 =
19. 19.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.693 + 396 =
28. 28.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?

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