1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 104 · 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. 1.297 + 792 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 940. 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 3. What is that number?
5. 5.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 104. 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 5. What is that number?
10. 10.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.594 + 495 =
13. 13.891 + 198 =
14. 14.198 + 891 =
15. 15.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 884. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.792 + 297 =
28. 28.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 467: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. 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 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
38. 38.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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