1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 983 · 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 604: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.693 + 396 =
3. 3.594 + 495 =
4. 4.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.198 + 891 =
8. 8.396 + 693 =
9. 9.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.792 + 297 =
15. 15.891 + 198 =
16. 16.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.495 + 594 =
18. 18.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 755: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 279: 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 8. What is that number?
31. 31.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 731. 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 7. What is that number?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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