Chapter 1 - Whole Numbers - 1.2 Adding Whole Numbers - 1.2 Exercises - Page 19: 49

$10,648$

$18 + 708 + 9286 + 636$ Start at the right of each number and add the ones digits $8 + 8 + 6 + 6 = 28$ ones Regroup the $28$ ones as $2$ tens and $8$ ones Write the $8$ ones in the ones column. Write the $2$ tens in the tens column Add the tens column next including the regrouped $2$ $2 + 1 +0 + 8 + 3 = 14$ tens Regroup the $14$ tens as $1$ hundred and $4$ tens Write the $4$ tens in the tens column. Write the $1$ hundred in the hundreds column Add the hundreds column next including the regrouped $1$ $1 + 7 + 2 + 6 = 16$ hundreds Regroup the $16$ hundreds as $1$ thousand and $6$ hundreds Write the $6$ hundreds in the hundreds column Write the $1$ thousand in the thousands column Add the thousands column next including the regrouped $1$ $1 + 9 = 10$ thousands Regroup the $10$ thousands as $1$ ten-thousand and $0$ thousands Write the $0$ in the thousands column and 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. $10648$ Separate each group of three digits with a comma. The sum of the four numbers is $10,648$