1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 210 · 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 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Take 378. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 930: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.792 + 297 =
17. 17.Take 215. 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 7. What is that number?
19. 19.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.891 + 198 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.693 + 396 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.594 + 495 =
28. 28.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.198 + 891 =
36. 36.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 235: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 683: reverse and subtract, then reverse that answer and add. What do you get?

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