Question

find $3,642 + 6,039$.
both numbers are broken apart by place value. add thousands to thousands, hundreds to hundreds, and so on.
$3,642=3,000+600+40+2$
$+6,039=6,000+0+30+9$
$\overline{\quad?\quad}+\overline{\quad?\quad}+\overline{\quad?\quad}+\overline{\quad?\quad}$

Explanation:

Step1: Add the thousands place

$3000 + 6000 = 9000$

Step2: Add the hundreds place

$600 + 0 = 600$

Step3: Add the tens place

$40 + 30 = 70$

Step4: Add the ones place

$2 + 9 = 11$

Step5: Sum all partial results

$9000 + 600 + 70 + 11 = 9681$

Answer:

$9681$
(The filled boxes from top to bottom are: $9000$, $600$, $70$, $11$)