5.36×8.4+9.28×4.2怎样简便计算
问题描述:
5.36×8.4+9.28×4.2怎样简便计算
答
5.36×8.4+9.28×4.2
=5.36×2×4.2+9.28×4.2
=10.72×4.2+9.28×4.2
=(10.72+9.28)×4.2
=20×4.2
=84