1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 9 · 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. 2.891 + 198 =
3. 3.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.297 + 792 =
6. 6.Take 533. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 138. 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 6. What is that number?
11. 11.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.792 + 297 =
14. 14.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 823: 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 3. What is that number?
18. 18.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 659: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 347: 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 5. What is that number?
29. 29.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.396 + 693 =
40. 40.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?

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