1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 203 · 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.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.792 + 297 =
4. 4.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 590. 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 2. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.396 + 693 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.198 + 891 =
30. 30.495 + 594 =
31. 31.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 593: 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 3. What is that number?
36. 36.693 + 396 =
37. 37.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?

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