Question

7.5+21/5=

Mn giúp e nha

Answer 1

\(7.5+\dfrac{21}{5}=35+\dfrac{21}{5}=\dfrac{175}{5}+\dfrac{21}{5}=\dfrac{196}{5}\)

Answer 2

7.5+\(\dfrac{21}{5}\)=35+\(\dfrac{21}{5}\)=\(\dfrac{35}{1}+\dfrac{21}{5}=\dfrac{175}{5}+\dfrac{21}{5}=\dfrac{196}{5}\)

Answer 3

bn nên ghi rõ dấy `,` nhé lớp `6` học `.` là nhân nhé bn ^^

`7,5 + 21/5`

`= 15/2 + 21/5`

`= 75/10 + 42/10`

`= (75 + 42)/10`

`= 117/10`