1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 114 · 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. 1.594 + 495 =
2. 2.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 632. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.396 + 693 =
6. 6.Do the 1089 trick with 489: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.297 + 792 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.792 + 297 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.891 + 198 =
15. 15.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 285. 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 3. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 789: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 658: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.198 + 891 =
25. 25.Take 284. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 317. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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