Question

tinh bang hai cach 

( 6,7 + 2,3 + 5,8) : 1,2

giup minh luon nhe lam on 

Answer 1

(6,7 + 2, 3 +5,8):1,2

14,8 : 2 

7,4

Bạn cho mình đi

Answer 2

\(C1:\)

\((6,7 + 2,3 + 5,8) : 1,2\)

\(= 14,8 : 1,2\)

\(= \frac {37}{3}\)

\(C2:\)
\((6,7+2,3+5,8) : 1,2 \)

\(= 6,7:1,2 + 2,3:1,2+5,8:1,2\)

\(= \frac {67}{12} + \frac {23}{12} + \frac {29}{6}\)

\(= \frac {37}{3}\)


 

Answer 3

Cách 1:

( 6,7 + 2,3 + 5,8 ) : 1,2

= ( 10 + 5,8 ) : 12

= 15,8 : 12

= \(\frac{79}{5}\): \(\frac{12}{1}\)

= \(\frac{79}{5}\)x \(\frac{1}{12}\)

= \(\frac{79}{60}\)

Cách 2:

( 6,7 + 2,3 + 5,8 ) : 12

= ( \(\frac{67}{10}+\frac{23}{10}+\frac{58}{10}\)) : \(\frac{12}{1}\)

= ( \(\frac{100}{10}\)+ \(\frac{58}{10}\)) : \(\frac{12}{1}\)

= \(\frac{158}{10}\): \(\frac{12}{1}\)

= \(\frac{158}{10}\)x \(\frac{1}{12}\)

= \(\frac{158}{120}\)= \(\frac{79}{60}\)

Answer 4

Xin lỗi mình tính nhầm 

Answer 5

Cam on ban VO AN CHI nhe ket qua cua ban moi dung