题干

9.99×22.2+33.3×3.34
上一题 下一题 0.0难度 选择题 更新时间:2019-11-22 09:46:42

答案(点此获取答案解析)

解:9.99×22.2+33.3×3.34
=3.33×3×22.2+3.33×33.4
=3.33×66.6+3.33×33.4
=3.33×(66.6+33.4)
=3.33×100
=333