1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 387 · 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 806: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 803: 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 5. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.792 + 297 =
7. 7.Do the 1089 trick with 234: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.Take 521. 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 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.198 + 891 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 227: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 705: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.297 + 792 =
40. 40.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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