Question

find $271 + 265$.
now, add hundreds to hundreds, tens to tens, and ones to ones.
$271=200+70+1$
$+265=200+60+5$
$overline{?}$ $overline{?}$ $overline{?}$

Explanation:

Step1: Add the hundreds place values

$200 + 200 = 400$

Step2: Add the tens place values

$70 + 60 = 130$

Step3: Add the ones place values

$1 + 5 = 6$

Step4: Sum the three partial results

$400 + 130 + 6 = 536$

Answer:

536
(The missing box values from top to bottom are 400, 130, 6)