1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 295 · 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.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.297 + 792 =
8. 8.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.891 + 198 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.495 + 594 =
21. 21.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.594 + 495 =
26. 26.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 931. 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 5. What is that number?
30. 30.396 + 693 =
31. 31.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
38. 38.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?

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