342/21 + 8/9 = 1026/63 + 56/63 = 1082/63
k cho mình nha.!
\(\frac{342}{21}+\frac{8}{9}=\frac{114}{7}+\frac{8}{9}\)
\(=\frac{1026}{63}+\frac{56}{63}=\frac{1082}{63}\)
\(\frac{342}{21}+\frac{8}{9}\)
\(\frac{342}{21}=\frac{342\times9}{21\times9}=\frac{3078}{189}\)
\(\frac{8}{9}=\frac{8\times21}{9\times21}=\frac{168}{189}\)
\(\frac{3078}{189}+\frac{168}{189}=\frac{3078+168}{189}=\frac{3246}{189}\)
Vậy \(\frac{342}{21}+\frac{8}{9}=\frac{3246}{189}\)\(=\frac{1082}{63}\)
Đáp án là : \(\frac{1082}{63}\)
\(\frac{342}{21}+\frac{8}{9}=\frac{114}{7}+\frac{8}{9}=\frac{114\times9}{7\times9}+\frac{8\times7}{9\times7}=\frac{1026}{63}+\frac{56}{63}=\frac{1026+56}{63}=\frac{1082}{63}\)
T ủng hộ mk nhé bạn ^...^ ^_^
hỏi thế bao giờ không ?
