1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 491 · 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 865: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.297 + 792 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 265: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.594 + 495 =
12. 12.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.891 + 198 =
14. 14.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.396 + 693 =
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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