Question

8-4 : 3/4 =

3/7:3/5 -4/7 =

5/8 x 2/5 + 5/8 x3/5 =

 tôi cầu xin các bạn cho tôi đáp án ngay bây giờ tôi xin các bạn.

Answer 1

8-4 : 3/4 =8-13/4

3/7:3/5 -4/7 =5/7-4/7=1/7

5/8 x 2/5 + 5/8 x3/5 =5/8 x (2/5+3/5)=5/8 x 1=5/8

Answer 2

$#flo2k9$

`8 - 4 : 3/4 = 8 - 4 xx 4/3 = 8 - 16/3 = 8/3`

`3/7 : 3/5 - 4/7 = 3/7 xx 5/3 - 4/7 = 5/7 - 4/7 = 1/7`

`5/8 xx 2/5 + 5/8 xx 3/5 = 5/8 xx ( 2/5 + 3/5) = 5/8 xx 1= 5/8`

Answer 3

8-4 : 3/4 = =\(8-4x\dfrac{4}{3}=8-\dfrac{16}{3}=\dfrac{24}{3}-\dfrac{16}{3}=\dfrac{8}{3}\)

3/7:3/5 -4/7 = \(\dfrac{3}{7}x\dfrac{5}{3}-\dfrac{4}{7}=\dfrac{5}{7}-\dfrac{4}{7}=\dfrac{1}{7}\)

5/8 x 2/5 + 5/8 x3/5 = \(\dfrac{5}{8}x\left(\dfrac{2}{5}+\dfrac{3}{5}\right)=\dfrac{5}{8}x1=\dfrac{5}{8}\)

Answer 4

\(8-4:\dfrac{3}{4}=8-\dfrac{4\times4}{3}=8-\dfrac{16}{3}=\dfrac{24}{3}-\dfrac{16}{3}=\dfrac{8}{3}\)

\(\dfrac{3}{7}:\dfrac{3}{5}-\dfrac{4}{7}=\dfrac{5}{7}-\dfrac{4}{7}=\dfrac{1}{7}\)

\(\dfrac{5}{8}\times\dfrac{2}{5}+\dfrac{5}{8}\times\dfrac{3}{5}=\dfrac{5}{8}\times\left(\dfrac{2}{5}+\dfrac{3}{5}\right)=\dfrac{5}{8}\times\dfrac{5}{5}=\dfrac{5}{8}\)

Answer 5

\(8-4:\dfrac{3}{4}=8-4\times\dfrac{4}{3}=8-\dfrac{16}{3}=\dfrac{24}{3}-\dfrac{16}{3}=\dfrac{8}{3}\)

 

\(\dfrac{3}{7}:\dfrac{3}{5}-\dfrac{4}{7}=\dfrac{3}{7}\times\dfrac{5}{3}-\dfrac{4}{7}=\dfrac{15}{21}-\dfrac{4}{7}=\dfrac{5}{7}-\dfrac{4}{7}=\dfrac{1}{7}\)

 

\(\dfrac{5}{8}\times\dfrac{2}{5}+\dfrac{5}{8}\times\dfrac{3}{5}=\dfrac{5}{8}\times\left(\dfrac{2}{5}+\dfrac{3}{5}\right)=\dfrac{5}{8}\times\dfrac{5}{5}=\dfrac{5}{8}\times1=\dfrac{5}{8}\)