1、431.25+521.49+329.18=( )

A.1382.98 B.1281.92 C.1281.83 D.1286.45

2、7329.2-235.7-3213.5-2356.1=( )

A.1786.5 B.1682.3 C.1523.9 D.1512.1

3、23.67+25.79+23.15+22.18+24.6+28.91=( )

A.158.25 B.150.28 C.148.30 D.148.26