1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 3 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.396 + 693 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 934. 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 5. What is that number?
11. 11.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Do the 1089 trick with 944: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 611. 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 4. What is that number?
18. 18.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.792 + 297 =
30. 30.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.297 + 792 =
32. 32.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.693 + 396 =
34. 34.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 874: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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