①6760÷13+17×25,
=520+425,
=945;
②4.35×6.8+56.5×0.68,
=4.35×6.8+5.65×6.8,
=(4.35+5.65)×6.8,
=10×6.8,
=68;
③
4
9 ÷(
5
6 -
1
2 )×
7
8 ,
=
4
9 ÷
1
3 ×
7
8 ,
=
4
3 ×
7
8 ,
=
7
6 ;
④346÷34.6%-346,
=1000-346,
=654.
①6760÷13+17×25,
=520+425,
=945;
②4.35×6.8+56.5×0.68,
=4.35×6.8+5.65×6.8,
=(4.35+5.65)×6.8,
=10×6.8,
=68;
③
4
9 ÷(
5
6 -
1
2 )×
7
8 ,
=
4
9 ÷
1
3 ×
7
8 ,
=
4
3 ×
7
8 ,
=
7
6 ;
④346÷34.6%-346,
=1000-346,
=654.