1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 189 · 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 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.594 + 495 =
4. 4.Do the 1089 trick with 335: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.792 + 297 =
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 981: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 900: 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 5. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 976: 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.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.297 + 792 =
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.891 + 198 =
27. 27.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
35. 35.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
40. 40.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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