字典翻译 问答 其它 脱式计算,能简算的要简算.①67.5×0.52+3.25×5.2②36×(56+79)③42÷(65÷37)④3.5×[(702-270)÷16].
问题标题:
脱式计算,能简算的要简算.①67.5×0.52+3.25×5.2②36×(56+79)③42÷(65÷37)④3.5×[(702-270)÷16].
问题描述:

脱式计算,能简算的要简算.

5
①67.5×0.52+3.25×5.2②36×(
6
+79)③42÷(65÷37)④3.5×[(702-270)÷16].

曹燕回答:
  ①67.5×0.52+3.25×5.2,   =6.75×5.2+3.25×5.2,   =(6.75+3.25)×5.2,   =10×5.2,   =52;   ②36×(56
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