简便计算：99.9*1.9+33.3*4.3_数学解答

简便计算：99.9*1.9+33.3*4.3

人气：411 ℃　时间：2020-05-24 09:03:44

解答

99.9×1.9+33.3×4.3
=33.3×3×1.9+33.3×4.3
=33.3×（3×1.9）+33.3×4.3
=33.3×5.7+33.3×4.3
=33.3×（5.7+4.3）
=33.3×10
=333