1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 990 · 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 4. What is that number?
2. 2.495 + 594 =
3. 3.693 + 396 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.396 + 693 =
9. 9.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 709: 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 1. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.198 + 891 =
20. 20.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.297 + 792 =
24. 24.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?

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