Answer
$40,000,000+7,000,000+700,000+3,000+20+9$
Work Step by Step
To write in expanded form write an addition expression where each addend is the value for each digit, using the digit and its place value.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ten-\ \ \ $
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ million\ \ \ \ \ \ thousand\ \ \
\ hundred\ \ \ one$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \underset\uparrow4\ \ \ \ \ \ \overset\downarrow7\ \ \ \ \ \ \underset\uparrow7\ \ \ \ \ \ \overset\downarrow0\ \ \ \ \ \ \underset\uparrow3\ \ \ \ \ \ \overset\downarrow0\ \ \ \ \ \ \underset\uparrow2\ \ \ \ \ \ \overset\downarrow9$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ten-\ \ \ \ hundred-\ \ \ thou-\ \ \ \ ten$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ million\ \ \ \ thousand\ \ \ \ \ \ sand$
