1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 151 · 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.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 799: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.693 + 396 =
6. 6.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 660: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.891 + 198 =
11. 11.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Take 481. 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 1. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.297 + 792 =
36. 36.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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