1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 962 · 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. 2.297 + 792 =
3. 3.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.396 + 693 =
11. 11.891 + 198 =
12. 12.Do the 1089 trick with 330: 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 5. What is that number?
14. 14.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.693 + 396 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.594 + 495 =
22. 22.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.198 + 891 =
25. 25.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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