1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 694 · 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 851: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.693 + 396 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 520. 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 8. What is that number?
13. 13.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.396 + 693 =
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?

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