Question

Tính giá trị biểu thức

A= -1,6 : ( 1+ \(\frac{2}{3}\))

B= 1,4 . \(\frac{15}{49}\)- (\(\frac{4}{5}+\frac{2}{3}\)) : \(2\frac{1}{5}\)

Answer 1

A= -8/5: (1+2/3)

 = -8/5:5/3

 = -8/5.3/5

 = -24/25

B= 7/5.15/49-22/15: 11/5

 = 3/7-2/5

 = 1/35

Answer 2

\(A=-1,6:\left(1+\frac{2}{3}\right)\)

\(A=-1,6:\frac{5}{3}\)

\(A=-\frac{24}{25}\)

\(B=1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)

\(B=\frac{135}{98}-\frac{2}{3}\)

\(B=\frac{209}{294}\)