6.8×0.41+0.59×3.4×2 3.39×9.9 简便计算

分类: 作业答案 • 2022-02-21 19:06:22

问题描述：

答

6.8×0.41+0.59×3.4×2 =6.8×0.41+0.59×6.8=6.8×(0.41+0.59)=6.8×1=6.8 3.39×9.9 =3.39×(10-0.1)=33.9-0.339=33.561