1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 108 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 750. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.792 + 297 =
7. 7.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.396 + 693 =
9. 9.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.594 + 495 =
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.693 + 396 =
21. 21.198 + 891 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.495 + 594 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 649. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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