1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 906 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.198 + 891 =
3. 3.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.792 + 297 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 824: 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 2. What is that number?
13. 13.396 + 693 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 558: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.297 + 792 =
37. 37.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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