Question

is 126 round to the nearest ten

Answer 1

No, 126 to the nearest tenth would be 130. 

Answer 2

First find the number in the tens place.  This number is 2.  Now you look at the number after it.  If it is greater than 5 round the number up and vice versa.  Since 6 is greater than 5, round 2 up to 3.  The rounded number would be 130.