1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 684 · 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 298: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.297 + 792 =
8. 8.693 + 396 =
9. 9.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.198 + 891 =
12. 12.Take 722. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.495 + 594 =
15. 15.Do the 1089 trick with 754: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.792 + 297 =
22. 22.Do the 1089 trick with 377: 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 2. What is that number?
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 773: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.891 + 198 =
32. 32.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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