来源：学生作业帮 编辑：拍题作业网作业帮 分类：数学作业 时间：2024/05/19 22:46:23
合理、灵活地计算下面各题.0.25*16 3.14*45.4+54.6*3.14 6.15*9.4
0.25*16=0.25*4*4=1*4=4
3.14*45.4+54.6*3.14
=3.14*(45.4+54.6)
=3.14*100
=314
6.15*9.4
=(6+0.15)*(9+0.4)
=54+1.35+0.06+2.4
=54+1.41+2.4
=54+3.81
=57.81
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