1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 946 · 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. 1.297 + 792 =
2. 2.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.396 + 693 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.Take 854. Reverse its digits and take the smaller number away from the bigger one. 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.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.891 + 198 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.198 + 891 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 789: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 308: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.594 + 495 =
35. 35.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
38. 38.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.792 + 297 =

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