1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 630 · 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 690: 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 6. What is that number?
3. 3.792 + 297 =
4. 4.495 + 594 =
5. 5.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.693 + 396 =
9. 9.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.198 + 891 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.594 + 495 =
16. 16.891 + 198 =
17. 17.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.396 + 693 =
31. 31.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 234: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?

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