简便计算 6.25乘2.4+4.25乘2.4-2.4

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/02 18:20:22

简便计算 6.25乘2.4+4.25乘2.4-2.4
简便计算 6.25乘2.4+4.25乘2.4-2.4

简便计算 6.25乘2.4+4.25乘2.4-2.4
=2.4*(6.25+4.25-1)
=2.4*9.5
=2.4*10-2.4*0.5
=24-1.2
=22.8

6.25乘2.4+4.25乘2.4-2.4
=(6.25+4.25-1)乘2.4
=9.5乘2.4
=10乘2.4-2.4/2
=24-1.2
=22.8

=(6.25+4.25-1)*2.4=9.5*2.4=2.4*(10-0.5)=24-1.2=22.8

6.25X(2.4+4.25)X(2.4-2.4)
=6.25X(2.4+4.25)X0
=0(因为任何数乘0都得0)

我想原题是这样才对

6.25*2.4+4.25*2.4-2.4
=(6.25+4.25-1+0.5)*2.4-0.5*2.4
=24-1.2
=22.8

2.4*(6.25+4.25)-2.4=2.4*10.5-2.4=22.8

6.25*2.4+4.25*2.4-2.4
=(6.25+4.25-1)*2.4
=9.5*2.4
=22.8

6.25乘以2.4+4.25乘以2.4-2.4乘以1
=(6.25+4.25-1)乘以2.4
=9.5乘以2.4
=(9+0.5)乘以(2+0.4)
=18+3.6+1+0.2
=22.8

自己算
6.25
×2.4 0
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