1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 73 · 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 900: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.495 + 594 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.891 + 198 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.792 + 297 =
13. 13.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.198 + 891 =
15. 15.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 844. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 940. 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 7. What is that number?
25. 25.297 + 792 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 947: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 936: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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