1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 132 · 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 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Do the 1089 trick with 143: 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 1. What is that number?
5. 5.297 + 792 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. 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 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 960. 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 7. What is that number?
18. 18.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 184: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 742. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 945: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 277: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.396 + 693 =
36. 36.495 + 594 =
37. 37.891 + 198 =
38. 38.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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