4.25-(18.1-15.27)简便计算,可以简便吗?和3.84-2.9+2.16-3.1
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4.25-(18.1-15.27)简便计算,可以简便吗?和3.84-2.9+2.16-3.1
4.25-(18.1-15.27)简便计算,可以简便吗?和3.84-2.9+2.16-3.1
4.25-(18.1-15.27)简便计算,可以简便吗?和3.84-2.9+2.16-3.1
4.25-(18.1-15.27)
=4.25+15.27-18.1
=19.52-18.1
=1.42
3.84-2.9+2.16-3.1
=(3.84+2.16)-(2.9+3.1)
=6-6
=0
4.25+15.27-18.1=1.42
3.84+2.16-(2.9+3.1)=0
4.25-(18.1-15.27) 直接算就可以了
3.84-2.9+2.16-3.1=(3.84+2.16)-(2.9+3.1)=0