Chapter 1 - Whole Numbers - 1.2 Adding Whole Numbers - 1.2 Exercises - Page 18: 38

$1412$

$686 + 726$ Start at the right of each number and add the ones digits $6 + 6 = 12$ ones Regroup the $12$ ones as $1$ ten and $2$ ones Write the $2$ ones in the ones column. Write the $1$ ten in the tens column Add the tens column next including the regrouped $1$ $1 + 8 + 2 = 11$ tens Regroup the $11$ tens as $1$ hundred and $1$ ten Write the $1$ ten in the tens column. Write the $1$ hundred in the hundreds column Add the hundreds column next including the regrouped $1$ $1 + 6 + 7 = 14$ hundreds Regroup the $14$ hundreds as $1$ thousand and $4$ hundreds Write the $4$ hundreds in the hundreds column Write the $1$ thousand in the thousands column Write the thousands column next which is the regrouped $1$ $1$ thousand The sum of the two numbers is $1412$