1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 958 · 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 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.495 + 594 =
11. 11.594 + 495 =
12. 12.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 472. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
20. 20.297 + 792 =
21. 21.693 + 396 =
22. 22.198 + 891 =
23. 23.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.792 + 297 =
30. 30.Do the 1089 trick with 428: 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 6. What is that number?
32. 32.Do the 1089 trick with 572: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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