Tính nhanh: d) 3/8 : ( 7/22 − 2/11 ) + 3/8 : ( 2/5 − 1/10 )
Giải thích
d) 38:(722−211)+38:(25−110)
=38:(722−422)+38:(410−110)
=38:322+38:310
=38.(223+103)=38.323=4
d) 38:(722−211)+38:(25−110)
=38:(722−422)+38:(410−110)
=38:322+38:310
=38.(223+103)=38.323=4