1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 905 · 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. 1.792 + 297 =
2. 2.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.495 + 594 =
9. 9.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 568: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 164. 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 8. What is that number?
13. 13.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.891 + 198 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.198 + 891 =
28. 28.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 900. 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.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.297 + 792 =
38. 38.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.594 + 495 =

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