1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 51 · 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 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Take 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.594 + 495 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.792 + 297 =
17. 17.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 770. 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 5. What is that number?
20. 20.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 729. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.693 + 396 =
29. 29.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.396 + 693 =
32. 32.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.495 + 594 =
34. 34.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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