1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 56 · 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 491: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.297 + 792 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.594 + 495 =
11. 11.Take 548. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 598. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
16. 16.Take 970. 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 3. What is that number?
18. 18.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 117: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Do the 1089 trick with 855: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.198 + 891 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
40. 40.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?

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