1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 74 · 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 630: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.693 + 396 =
15. 15.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.594 + 495 =
23. 23.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.198 + 891 =
25. 25.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 957. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 860. 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 2. What is that number?
32. 32.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.792 + 297 =
39. 39.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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