Put commas in appropriate positions for $497823$ in International system and write the number's name.

Find the place value and face value of the encircled digit:

$8 \overline{)2} 3 4 1$

Find the place value and face value of the encircled digit

$3 7 \overline{)9} 8 2 1$

Find the place value and face value of the encircled digit

$9 2 \overline{)5} 4 7 6$

Estimate the numbers to the nearest tens and thousands.

$1456+21432+5555$

Estimate the numbers to the nearest tens and thousands.

$37490+12345+237$

Estimate the numbers to the nearest thousands.

$76543+65437+5374$

Estimate the numbers to the nearest tens and thousands.

$32345+12312+4112$

Estimate the difference to the nearest thousands

$85432-45371$