Question

Tính A = \(\frac{3}{4}.\frac{5}{9}+\frac{6}{7}:\frac{4}{3}-1\frac{2}{5}:1\frac{1}{3}\)

ai đúng tick (đang hok toán 7 khó quá)

Answer 1

Trả lời :

\(A=\frac{3}{4}\times\frac{5}{9}+\frac{6}{7}\times\frac{3}{4}-\frac{7}{5}\times\frac{3}{4}\)

\(\Rightarrow A=\frac{3}{4}\times\left(\frac{5}{9}+\frac{6}{7}-\frac{7}{5}\right)\)

\(\Rightarrow A=\frac{3}{4}\times\frac{4}{315}\)

\(\Rightarrow A=\frac{3}{315}=\frac{1}{105}\)

Answer 2

Trả lời:

\(A=\frac{3}{4}\times\frac{5}{9}+\frac{6}{7}\div\frac{4}{3}-1\frac{2}{5}\div1\frac{1}{3}\)

\(A=\frac{3}{4}\times\frac{5}{9}+\frac{6}{7}\times\frac{3}{4}-\frac{7}{5}\div\frac{4}{3}\)

\(A=\frac{3}{4}\times\frac{5}{9}+\frac{6}{7}\times\frac{3}{4}-\frac{7}{5}\times\frac{3}{4}\)

\(A=\frac{3}{4}\times\left(\frac{5}{9}+\frac{6}{7}-\frac{7}{5}\right)\)

\(A=\frac{3}{4}\times\frac{4}{315}\)

\(A=\frac{1}{105}\)

Học tốt 

Answer 3

Chịu khó tí là ez game luôn :)

\(A=\frac{3}{4}\cdot\frac{5}{9}+\frac{6}{7}:\frac{4}{3}-1\frac{2}{5}:1\frac{1}{3}\)

\(A=\frac{3}{4}\cdot\frac{5}{9}+\frac{6}{7}:\frac{4}{3}-\frac{7}{5}:\frac{4}{3}\)

\(A=\frac{3}{4}\cdot\frac{5}{9}+\frac{6}{7}\cdot\frac{3}{4}-\frac{7}{5}\cdot\frac{3}{4}\)

\(A=\frac{3}{4}\left(\frac{5}{9}+\frac{6}{7}-\frac{7}{5}\right)\)

\(A=\frac{3}{4}\cdot\frac{4}{315}\)

\(A=\frac{3}{315}=\frac{1}{105}\)

Answer 4

A = \(\frac{3}{4}\)\(\times\frac{5}{9}\)\(+\frac{6}{7}\)\(\times\frac{3}{4}\)\(-\frac{7}{5}\)\(\times\frac{3}{4}\)

A = \(\frac{3}{4}\)\(\times(\frac{6}{7}\)\(+\frac{5}{9}\)\(-\frac{7}{5}\)\()\)

A = \(\frac{3}{4}\)\(\times\frac{4}{315}\)

A = \(\frac{3}{315}\)\(=\frac{1}{105}\)

Học tốt !!!

Answer 5

cho e hỏi tí

sao các a cj viết đc phân số v

các a cj có thể chỉ đc ko

Answer 6

a=3/4.5/9+6/7:4/3-7/5:4/3

a=3/4.5/9+6/7.3/4-7/5.3/4

a=3/4.(5/9+6/7-7/5)

a=3/4.4/315

a=1/105