1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 221 · 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.Take 543. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.297 + 792 =
7. 7.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.Do the 1089 trick with 890: 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.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 226: 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 6. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.396 + 693 =
25. 25.495 + 594 =
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 296: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?

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