Estimate 17.411-3.66 by first rounding to the nearest tenth

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