1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 479 · 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 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.792 + 297 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.297 + 792 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.396 + 693 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.891 + 198 =
33. 33.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.693 + 396 =
40. 40.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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