7分之5×25%+7分之2×4分之1
问题描述:
7分之5×25%+7分之2×4分之1
答
5/7×25%+2/7×1/4
=0.25×(5/7+2/7)
=0.25
7分之5×25%+7分之2×4分之1
5/7×25%+2/7×1/4
=0.25×(5/7+2/7)
=0.25