Question

B= \(8\frac{2}{7}-\left(3\frac{1}{9}+4\frac{2}{7}\right)\)

Answer 1

 

B = \(8\frac{2}{7}-\left(3\frac{1}{9}+4\frac{2}{7}\right)\)

    = \(8\frac{2}{7}-3\frac{1}{9}-4\frac{2}{7}\)

    = \(\left(8\frac{2}{7}-4\frac{2}{7}\right)-3\frac{1}{9}\)

    = 4 - \(3\frac{1}{9}\)

     =  4 - \(\frac{28}{9}\)

     = \(\frac{36}{9}-\frac{28}{9}\)

     =   \(\frac{8}{9}\)

Answer 2

B=\(\frac{58}{7}\)-(\(\frac{28}{9}\)+\(\frac{30}{7}\))

B=\(\frac{58}{7}\)-\(\frac{30}{7}\)-\(\frac{28}{9}\)

B=4-\(\frac{28}{9}\)

B=\(\frac{8}{9}\)

Answer 3

\(B=8\frac{2}{7}-\left(3\frac{1}{9}+4\frac{2}{7}\right)\)

\(B=8\frac{2}{7}-\frac{466}{63}\)

\(B=\frac{8}{9}\)

Vậy \(B=\frac{8}{9}\)

 

Answer 4

Bạn xem lời giải của mình nhé:

Giải:

\(8\frac{2}{7}-\left(3\frac{1}{9}+4\frac{2}{7}\right)\\ =8\frac{2}{7}-3\frac{1}{9}-4\frac{2}{7}\\ =\left(8\frac{2}{7}-4\frac{2}{7}\right)-3\frac{1}{9}\\ =4-3\frac{1}{9}\\ =3\frac{9}{9}-3\frac{1}{9}\\ =\frac{8}{9}\)

Chúc bạn học tốt!