2.5×3/10+7.5÷3又1/3

问题描述:

2.5×3/10+7.5÷3又1/3

2.5×3/10+7.5÷3又1/3
=2.5×3/10+7.5x3/10
=(2.5+7.5)x3/10
=10x3/10
=3