1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 655 · 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 982: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.495 + 594 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.297 + 792 =
6. 6.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.396 + 693 =
9. 9.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 662. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 378. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Do the 1089 trick with 659: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.198 + 891 =
30. 30.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 884: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 622: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.891 + 198 =
38. 38.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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