1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 766 · 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 930: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.495 + 594 =
6. 6.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. 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.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 644: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.297 + 792 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
29. 29.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 578: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.891 + 198 =
35. 35.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 983: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.693 + 396 =
38. 38.Take 357. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 426: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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