1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 656 · 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 811: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.Take 276. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.792 + 297 =
8. 8.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.891 + 198 =
16. 16.Do the 1089 trick with 580: 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 6. What is that number?
18. 18.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 115: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 476: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
36. 36.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.495 + 594 =
40. 40.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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