作业帮用简便方法计算 用简便方法计算 3.45×102 0.47×0.5×0.8 0.46×1.9+0.54×1.9
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/04 05:56:13
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用简便方法计算 用简便方法计算 3.45×102 0.47×0.5×0.8 0.46×1.9+0.54×1.9
用简便方法计算 用简便方法计算 3.45×102 0.47×0.5×0.8 0.46×1.9+0.54×1.9
用简便方法计算 用简便方法计算 3.45×102 0.47×0.5×0.8 0.46×1.9+0.54×1.9
3.45×102
=3.45×(100+2)
=3.45×100+3.45×2
=345+6.9
=351.9
0.47×0.5×0.8
=0.47×(0.5×0.8)
=0.47×0.4
=0.188
0.46×1.9+0.54×1.9
=(0.46+0.54)×1.9
=1×1.9
=1.9