1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 917 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 311. 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 8. What is that number?
5. 5.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.297 + 792 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.693 + 396 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.396 + 693 =
23. 23.Do the 1089 trick with 587: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.198 + 891 =
26. 26.792 + 297 =
27. 27.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 299: 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 7. What is that number?
32. 32.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?

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