1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 150 · 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 523: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.297 + 792 =
9. 9.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.198 + 891 =
24. 24.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 175: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 257: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 588: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.891 + 198 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.396 + 693 =

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