Answer: 21.1
Step-by-step explanation:
Rounding 17.411: Find the number in the tenth place 4 and look one place to the right for the rounding digit 1 . Round up if this number is greater than or equal to 5 and round down if it is less than 5 . = 17.4
Rounding 3.66: Find the number in the tenth place 6 and look one place to the right for the rounding digit 6 . Round up if this number is greater than or equal to 5 and round down if it is less than 5 . = 3.7
Add 17.4+3.7 and get 21.1
