1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 575 · 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. 1.792 + 297 =
2. 2.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.594 + 495 =
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 821: 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 2. What is that number?
13. 13.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
17. 17.396 + 693 =
18. 18.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.297 + 792 =
28. 28.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 608. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?

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