Chapter 1 - Whole Numbers - 1.2 Adding Whole Numbers - 1.2 Exercises - Page 19: 53

$11,557$

$321 + 9603 + 8 + 21 + 1604$ Start at the right of each number and add the ones digits $1 + 3 + 8 + 1 + 4 = 17$ 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 column next including the regrouped $1$ $1 + 2 + 0 + 2 + 0 = 5$ tens Write the $5$ tens in the tens column. Add the hundreds column next $3 + 6 + 6 = 15$ hundreds Regroup the $15$ hundreds as $1$ thousand and $5$ hundreds Write the $5$ hundreds in the hundreds column Write the $1$ thousand in the thousands column. Add the thousands column next including the regrouped $1$ $1 + 9 + 1 = 11$ thousands Regroup the $11$ thousands as $1$ ten-thousand and $1$ thousand Write the $1$ in the thousands column. Write the $1$ in the ten-thousands column Add the ten-thousands column next which is the regrouped $1$ Write the $1$ in the ten-thousands column. $11557$ Separate each group of three digits with a comma. The sum of the five numbers is $11,557$