1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 888 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
2. 2.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 268: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 721: 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 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.594 + 495 =
17. 17.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.792 + 297 =
23. 23.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.891 + 198 =
32. 32.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 452: 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 5. What is that number?
36. 36.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?

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