1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 925 · 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. 1.198 + 891 =
2. 2.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.396 + 693 =
5. 5.891 + 198 =
6. 6.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.693 + 396 =
10. 10.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 884: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.495 + 594 =
23. 23.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 955: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Take 765. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 698. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.594 + 495 =
35. 35.297 + 792 =
36. 36.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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