1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 935 · 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 2. What is that number?
2. 2.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.792 + 297 =
5. 5.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 184: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.495 + 594 =
9. 9.198 + 891 =
10. 10.594 + 495 =
11. 11.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.693 + 396 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.396 + 693 =
18. 18.Take 621. 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.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.891 + 198 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 378: reverse and subtract, then reverse that answer and add. What do you get?

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