1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 981 · 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 268: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 883. 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 6. What is that number?
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 456: 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 5. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 537. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.792 + 297 =
16. 16.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 826. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.891 + 198 =
20. 20.594 + 495 =
21. 21.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.198 + 891 =
24. 24.Take 478. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 900: 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 3. What is that number?
35. 35.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 548: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 886: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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