99.99X22.22+33.33X33.34怎麼簡算?

題目：

99.99X22.22+33.33X33.34怎麼簡算?

解答：

99.99×22.22+33.33×33.34
=(99.99÷3)×(22.22×3)+33.33×33.34
=33.33×66.66+33.33×33.34
=33.33×(66.66+33.34)
=33.33×100
=3333