1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 316 · 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 670: 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 4. What is that number?
3. 3.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.594 + 495 =
15. 15.297 + 792 =
16. 16.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 704: 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 7. What is that number?
23. 23.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
28. 28.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
35. 35.396 + 693 =
36. 36.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 236: reverse and subtract, then reverse that answer and add. What do you get?

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