1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 985 · 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 800: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.792 + 297 =
8. 8.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 745: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.891 + 198 =
13. 13.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.594 + 495 =
19. 19.297 + 792 =
20. 20.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.693 + 396 =
25. 25.Do the 1089 trick with 770: 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 3. What is that number?
27. 27.Take 691. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.396 + 693 =
35. 35.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?

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