1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 123 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. 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. 10.693 + 396 =
11. 11.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Take 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 452. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.198 + 891 =
18. 18.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 552. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.594 + 495 =
29. 29.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.891 + 198 =
33. 33.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 351. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 267. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 689: reverse and subtract, then reverse that answer and add. What do you get?

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