1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 359 · 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 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 229. 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 6. What is that number?
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.594 + 495 =
16. 16.891 + 198 =
17. 17.297 + 792 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.198 + 891 =
32. 32.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 910. 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 3. What is that number?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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