Question

Tính giá trị biểu thức:

A= -5,13 : [5\(\frac{5}{28}\)- 1\(\frac{8}{9}\)* 1,25 +1\(\frac{16}{63}\)]

B= [3\(\frac{1}{3}\)* 1,9 + 19,5 : 4\(\frac{1}{3}\)] * [\(\frac{62}{72}\)-\(\frac{4}{25}\)]

Answer 1

\(A=-5,13:\left(5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63}\right)\)

\(A=-5,13:\left(5\frac{5}{28}-\frac{85}{36}+1\frac{16}{63}\right)\)

\(A=-5,13:\frac{57}{14}=-\frac{63}{50}\)

\(B=\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{72}-\frac{4}{25}\right)\)

\(B=\left(\frac{19}{3}+\frac{9}{2}\right).\frac{631}{900}\)

\(B=\frac{65}{6}.\frac{631}{900}=\frac{8203}{1080}\)

Answer 2

dấu * là dấu nhân nha

Answer 3

cái này bn dùng máy tính cho nhanh

Answer 4

use calculator is the best !