几道数学简便提,会几题写几题..2.4x20又5分之3+33.1x7.6(3又9分之2+9又3分之2)÷(9分之1+3分之1)2345+3452+4523+5234
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 18:03:10
![几道数学简便提,会几题写几题..2.4x20又5分之3+33.1x7.6(3又9分之2+9又3分之2)÷(9分之1+3分之1)2345+3452+4523+5234](/uploads/image/z/1332639-63-9.jpg?t=%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E7%AE%80%E4%BE%BF%E6%8F%90%2C%E4%BC%9A%E5%87%A0%E9%A2%98%E5%86%99%E5%87%A0%E9%A2%98..2.4x20%E5%8F%885%E5%88%86%E4%B9%8B3%2B33.1x7.6%EF%BC%883%E5%8F%889%E5%88%86%E4%B9%8B2%2B9%E5%8F%883%E5%88%86%E4%B9%8B2%EF%BC%89%C3%B7%EF%BC%889%E5%88%86%E4%B9%8B1%2B3%E5%88%86%E4%B9%8B1%EF%BC%892345%2B3452%2B4523%2B5234)
几道数学简便提,会几题写几题..2.4x20又5分之3+33.1x7.6(3又9分之2+9又3分之2)÷(9分之1+3分之1)2345+3452+4523+5234
几道数学简便提,会几题写几题..
2.4x20又5分之3+33.1x7.6
(3又9分之2+9又3分之2)÷(9分之1+3分之1)
2345+3452+4523+5234
几道数学简便提,会几题写几题..2.4x20又5分之3+33.1x7.6(3又9分之2+9又3分之2)÷(9分之1+3分之1)2345+3452+4523+5234
1.
2.4*(20.6)+(20.6+12.5)*7.6
=20.6*(2.4+7.6)+12.5*(8-0.4)
=206+100-5
=301
2.
[12+2(1/9+1/3)]÷(1/9+1/3)
=12÷(1/9+1/3)+2
=12÷(4/9)+2
=12*9/4+2
=29
3.
=(2+3+4+5)*1111
=15554
2345+3452+4523+5234=15554