1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 220 · 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 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Take 378. 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 1. What is that number?
5. 5.693 + 396 =
6. 6.297 + 792 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 270. 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. 12.594 + 495 =
13. 13.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 773: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
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 422: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 240. Reverse its digits and take the smaller number away from the bigger one. 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 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 765. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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