1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 506 · 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 910: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.693 + 396 =
4. 4.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.792 + 297 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 896: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 683: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.495 + 594 =
31. 31.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.594 + 495 =
36. 36.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
38. 38.Take 855. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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