简便计算:9.99x2.22+3.33x3.34怎么算?要写出为什么

简便计算:9.99x2.22+3.33x3.34怎么算?要写出为什么
简便计算:9.99x2.22+3.33x3.34怎么算?
要写出为什么

简便计算:9.99x2.22+3.33x3.34怎么算?要写出为什么
9.99x2.22+3.33x3.34
=3.33x3x2.22+3.33x3.34
=3.33x(6.66+3.34)
=3.33x10
=33.3

9.99x2.22+3.33x3.34
=3.33x3x2.22+3.33x3.34
=3.33x6.66+3.33x3.34
=3.33x(6.66+3.34)
=3.33x10
=33.3

9.99x2.22+3.33x3.34
=3.33×6.66+3.33×3.34
=3.33×（6.66+3.34）
=3.33×10
=33.3