1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 331 · 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 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.891 + 198 =
6. 6.495 + 594 =
7. 7.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 775. 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.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.297 + 792 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 246: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.693 + 396 =
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.198 + 891 =

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