1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 654 · 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 498. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.792 + 297 =
3. 3.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 267. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 498: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.495 + 594 =
16. 16.Do the 1089 trick with 960: 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 4. What is that number?
18. 18.693 + 396 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
20. 20.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.594 + 495 =
24. 24.396 + 693 =
25. 25.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.297 + 792 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
32. 32.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.198 + 891 =

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