1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 892 · 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 510: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.495 + 594 =
7. 7.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.Take 681. 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.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.693 + 396 =
16. 16.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 960. 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 2. What is that number?
26. 26.Take 124. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 799. 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 4. What is that number?
38. 38.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?

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