1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 27 · 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 710. 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 1. What is that number?
3. 3.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 927: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.198 + 891 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 577. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.792 + 297 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?

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