1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 760 · 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. 1.198 + 891 =
2. 2.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 632: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.792 + 297 =
22. 22.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.594 + 495 =
29. 29.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.891 + 198 =
37. 37.693 + 396 =
38. 38.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 257: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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