1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 388 · 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 153: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.693 + 396 =
12. 12.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.198 + 891 =
19. 19.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.594 + 495 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
24. 24.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
27. 27.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 260. 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 7. What is that number?
30. 30.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 247: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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