一简便怎做
一简便怎做
一简便怎做
一简便怎做
=3/4 * (8/15 *5/2 + 8/15 * 3/2)
=3/4 * (4/3+4/5)
=3/4 * 4/3+ 3/4 * 4/5
=1+3/5
=8/5
先采纳
2/5+2/3=16/15 , 8/15除以16/15=1/2 3/4X1/2=3/8
一简便怎做
一简便怎做
一简便怎做
=3/4 * (8/15 *5/2 + 8/15 * 3/2)
=3/4 * (4/3+4/5)
=3/4 * 4/3+ 3/4 * 4/5
=1+3/5
=8/5
先采纳
2/5+2/3=16/15 , 8/15除以16/15=1/2 3/4X1/2=3/8