简便计算:(2.5+0.25+0.025)*4
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简便计算:(2.5+0.25+0.025)*4
简便计算:(2.5+0.25+0.025)*4
简便计算:(2.5+0.25+0.025)*4
用乘法分配律.
(2.5+0.25+0.025)*4
=2.5*4+0.25*4+0.025*4
=10+1+0.1
=11.1
(2.5+0.25+0.025)*4
=2.5*4+0.25*4+0.025*4
=10+1+0.1
=11.1
原始=2.5*4+0.25*4+0.025*4
=10+1+0.1
=11.1
(2.5+0.25+0.025)*4
=2.5*4+0.25*4+0.025*4
=10+1+0.1
=11.1