1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 741 · 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. 1.198 + 891 =
2. 2.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.891 + 198 =
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.Do the 1089 trick with 446: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 640. 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 6. What is that number?
17. 17.Do the 1089 trick with 195: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.495 + 594 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.693 + 396 =
32. 32.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 376: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.396 + 693 =
39. 39.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.594 + 495 =

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