Question

用简便方法计算：9.99乘以2.22加上3.33乘以3.34

Answer 1

9.99乘以2.22加上3.33乘以3.34
=3.33×6.66+3.33×3.34
=3.33×（6.66+3.34）
=3.33×10
=33.3