1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 589 · 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. 1.792 + 297 =
2. 2.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.495 + 594 =
11. 11.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.396 + 693 =
18. 18.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 698. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.693 + 396 =
29. 29.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Do the 1089 trick with 436: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 976: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.297 + 792 =
40. 40.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?

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