1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 836 · 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.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.594 + 495 =
6. 6.198 + 891 =
7. 7.693 + 396 =
8. 8.Do the 1089 trick with 937: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 853: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.495 + 594 =
14. 14.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 289: 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 6. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 980: 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 1. What is that number?
29. 29.792 + 297 =
30. 30.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?

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