a: =(83+38)/25
=125/25=5
b: =(92-29)/36
=62/36
=31/18
`83:25+38:25`
`=(83+38):25`
`=121:25`
`=5,84`
`92:36-29:36`
`=(92-29):36`
`=63:36`
`=1,75`
`a)83:25+38:25`
`=(83+38):25`
`=125:25`
`=5`
__
`b)92:36-29:36`
`=(92-29):36`
`=63:36`
`=63/36`
a, 83:25+38:25 b,92:36-29:36
=(83+38):25 =(92-29):36
=121:25 =63:36
=4,84 =1,75
83:25+38:2583:25+38:25
=(83+38):25=(83+38):25
=121:25=121:25
=5,84=5,84
92:36−29:3692:36-29:36
=(92−29):36=(92-29):36
=63:36=63:36
=1,75
#luan nguyen
