1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 442 · 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.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.396 + 693 =
5. 5.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.693 + 396 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.Take 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 800. 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 3. What is that number?
26. 26.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.594 + 495 =
33. 33.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
35. 35.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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