1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 678 · 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 422: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.594 + 495 =
4. 4.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.396 + 693 =
8. 8.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.297 + 792 =
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.198 + 891 =
21. 21.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 755: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?

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