1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 969 · 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 880: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.792 + 297 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.396 + 693 =
8. 8.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.891 + 198 =
12. 12.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.594 + 495 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 481: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.198 + 891 =
27. 27.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Take 533. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?

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