## Basic College Mathematics (9th Edition)

$18,777$
$5718$ + $5623$ + $7436$ Start at the right of each number Add the ones digits $8$ + $3$ + $6$ = $17$ ones Regroup the 17 ones as 1 ten and 7 ones Write the 7 ones in the ones column. Write the 1 ten in the tens column. Add the tens digits next including the regrouped 1. $1$ + $1$ + $2$ + $3$ = $7$ tens Write the 7 tens in the tens column. Add the hundreds digits next. $7$ + $6$ + $4$ = $17$ hundreds Regroup the 17 hundreds as 1 thousand and 7 hundreds Write the 7 hundreds in the hundreds column. Write the 1 thousand in the thousands column. Add the thousands digits next including the regrouped 1. $1$ + $5$ + $5$ + $7$ = $18$ thousands. Regroup the 18 thousands as 1 ten-thousand and 8 thousands. Write the 8 thousands in the thousands column. Write the 1 ten-thousand in the ten-thousand column. Add the ten-thousands digits next which is the regrouped 1. 1 ten-thousand Separate each group of three digits with a comma. The sum of the two numbers is $18,777$.