解:(5/7+3/5)x7+4/5等于( 10 )
∵已知需求出(5/7+3/5)x7+4/5等于多少
∴(5/7 + 3/5) x 7 + 4/5
= 5/7 × 7 + 3/5 × 7 + 4/5
= 5 + 21/5 + 4/5
= 5 + (21/5 + 4/5)
= 5 + 25/5
= 5 + 5
= 10
答:(5/7+3/5)x7+4/5等于10
(5/7+3/5)x7+4/5
=5/7x7+3/5x7+4/5
=5+21/5+4/5
=5+25/5
=5+5
=10