1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 200 · 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.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.198 + 891 =
6. 6.792 + 297 =
7. 7.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.396 + 693 =
16. 16.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 679. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
36. 36.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 630: 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 5. What is that number?
39. 39.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.693 + 396 =

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