Question

3/5+1/5:3=

7/12-4/3x2/9=

Answer 1

`3/5 + 1/5 : 3`

`= 3/5 + 1/15`

`= 2/3`.

`7/12 - 4/3 xx 2/9`

`= 7/12 xx 8/27`

`= 14/81`.

Answer 2

TỰ LÀM 
CÔ GIAO TỰ LÀM

Answer 3

ĐỀ ÔN TẬP KIỂM TRA CUỐI NĂM ;v

Answer 4

\(\dfrac{3}{5}+\dfrac{1}{5}\times\dfrac{1}{3}=\dfrac{3}{5}+\dfrac{1}{15}=\dfrac{9}{15}+\dfrac{1}{15}=\dfrac{10}{15}=\dfrac{2}{3}\)

\(\dfrac{7}{12}-\dfrac{8}{27}=\dfrac{63}{108}-\dfrac{32}{108}=\dfrac{31}{108}\)

Answer 5

c1= 2/3

c2= 31/108

Answer 6

2/3

14/81

tui IQ 80 nên ngu lắm sai ráng chịu

Answer 7

\(\dfrac{3}{5}+\dfrac{1}{5}:3\)

\(=\dfrac{3}{5}+\dfrac{1}{5}:\dfrac{3}{1}\)

\(=\dfrac{3}{5}+\dfrac{1}{5}\times\dfrac{1}{3}\)

\(=\dfrac{3}{5}+\dfrac{1}{15}\)

\(=\dfrac{9}{15}+\dfrac{1}{15}\)

\(=\dfrac{10}{15}=\dfrac{2}{3}\)