1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 309 · 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 866: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.396 + 693 =
3. 3.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.198 + 891 =
8. 8.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.891 + 198 =
12. 12.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 673. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 896: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Do the 1089 trick with 449: 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 3. What is that number?
24. 24.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.693 + 396 =
29. 29.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.792 + 297 =
38. 38.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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