9乘6.7+6.7乘4.
问题描述：
9乘6.7+6.7乘4.
答
5.9×6.7+6.7×4.1
=6.7×（5.9+4.1）
=6.7×10
=67
9乘6.7+6.7乘4.
5.9×6.7+6.7×4.1
=6.7×（5.9+4.1）
=6.7×10
=67