1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 967 · 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 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.396 + 693 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.792 + 297 =
15. 15.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.495 + 594 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 447. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. 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.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
38. 38.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?

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