问题标题:
3.45×3.6+0.345×64(用简便方法计算)
问题描述:

3.45×3.6+0.345×64(用简便方法计算)

吕进回答:
  3.45×3.6+0.345×64   =0.345x10x3.6+0.345×64   =0.345×(36+64)   =0.345x100   =34.5
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