1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 570 · 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. 1.495 + 594 =
2. 2.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.297 + 792 =
8. 8.Do the 1089 trick with 810: 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 5. What is that number?
10. 10.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.693 + 396 =
12. 12.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.891 + 198 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 389: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?

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