9.99x2.22+3.33x3.34
问题描述:
9.99x2.22+3.33x3.34
答
=3.33x3x2.22+3.33x3.34
=3.33x6.66+3.33x3.34
=3.33x(6.66+3.34)
=3.33x10
=33.3