1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 545 · 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 710: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
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 570: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.396 + 693 =
7. 7.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.891 + 198 =
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.792 + 297 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 812: 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 8. What is that number?
24. 24.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 762: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 853: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.495 + 594 =
33. 33.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 951: 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 4. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
37. 37.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?

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