1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 172 · 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 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 731. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Do the 1089 trick with 794: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.693 + 396 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.792 + 297 =
30. 30.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.594 + 495 =
33. 33.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?

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