1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 451 · 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. 1.198 + 891 =
2. 2.594 + 495 =
3. 3.Take 963. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.495 + 594 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.792 + 297 =
18. 18.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. 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 990: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
40. 40.396 + 693 =

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