12又5分之2-2又5分之2×3又4分之3÷2又2分之1,的简便运算
问题描述：
12又5分之2-2又5分之2×3又4分之3÷2又2分之1,的简便运算
答
化解成62/5-12/5*15/4*2/5
约分=62/5-18/5
=44/5
答
12又5分之2-2又5分之2×3又4分之3÷2又2分之1，
= 12+2/5 - 12/5 x 15/4 / 5/2
= 12+2/5 - 12/5 x 15/4 x 2/5
= 12+2/5 - 12 x15 x2 / 5x 4x 5
= 12+2/5 - 6 x3 / 5
= 62/5 - 18/5
= 44/5
答
12又5分之2-2又5分之2×3又4分之3÷2又2分之1
=12+2/5-(2+2/5)×(3+3/4)÷(2+1/2)
=12+2/5-(12/5)×(15/4)×(2/5)
=12+2/5-18/5
=12-16/5
=44/5;
如果本题有什么不明白可以追问,