Question

Estimate the following sum by rounding each number to the nearest ten.129.5 + 34.62 + 19.1

Answer 1

to get to the math section look below the notification icon on the top left you will see history. point to it. on the drop down menu click on "find more subjects" choose mathematics.

Answer 2

break each number into its parts by place value
look at the tens and the ones if you have more than 5 ones round up to the next tens
add the rounded numbers