1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 633 · 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 2. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.297 + 792 =
12. 12.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.495 + 594 =
18. 18.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.792 + 297 =
25. 25.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 883: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
28. 28.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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