1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 82 · 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. 1.891 + 198 =
2. 2.Take 247. 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 5. What is that number?
4. 4.792 + 297 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.297 + 792 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.198 + 891 =
10. 10.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.693 + 396 =
14. 14.Take 508. 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 2. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.396 + 693 =
26. 26.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 572: reverse and subtract, then reverse that answer and add. What do you get?

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