a)
\(34.86+68.37\)
\(=34.2.43+68.37\)
\(=68\left(43+37\right)=68.70=4760\)
b)
\(47.25+137.49+47.75-37.49\)
\(=47\left(25+75\right)+49\left(137-37\right)\)
\(=47.100+49.100\)
\(=100\left(47+49\right)\)
\(=100.96\)
=9600
34 . 86 + 68 . 37
= 34 . 2 . 43 + 68 . 37
= 68 . 43 + 68 . 37
= 68 . (43 + 37)
= 68 . 100
= 6800
47 . 25 + 137 . 49 + 47 . 75 - 37 . 49
= 47 . (25 + 75) + 49 . (137 - 37)
= 47 . 100 + 49 . 100
= 4700 + 4900
= 9600
a)
\(34.86+68.37\)
\(=34.2.43+68.37\)
\(=68\left(43+37\right)\)
=68.80
=6880
b)
\(47.25+137.49+47.75-37.49\)
=47(25+75) +49(137 - 37 )
=47 . 100+ 49 .100
=100.(47+49)
=100.96
=9600
34 . 86 + 68 . 37
= 34 . 2 . 43 + 68 . 37
= 68 . 43 + 68 . 37
= 68 . ( 43 + 37)
= 68. 100
= 6800
47 . 25 + 137 . 49 + 47 . 75 - 3 37 . 49
= 47 . ( 25 + 75) + 49 . ( 137 - 37 )
= 47 . 100 + 49 . 100
= 4700 + 4900
= 9600