1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 762 · 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. 1.396 + 693 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.891 + 198 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.594 + 495 =
9. 9.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 267. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.693 + 396 =
17. 17.297 + 792 =
18. 18.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 437: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 885: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 560. 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 6. What is that number?
33. 33.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.198 + 891 =
38. 38.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?

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