a) \(\frac{4}{5}=\frac{28}{35}\)
b) \(\frac{12}{15}=\frac{72}{90}\)
c) \(\frac{125}{300}=\frac{5}{12}\)
d) \(\frac{6}{9}=\frac{36}{54}\)
/HT\
a) \(\frac{4}{5}=\frac{28}{35}\) \(\text{X}=28\)
b) \(\frac{12}{15}=\frac{72}{90}\) \(\text{X}=90\)
c) \(\frac{125}{300}=\frac{5}{12}\) \(\text{X}=12\)
d) \(\frac{6}{9}=\frac{36}{54}\) \(\text{X}=6\)
\(a,\)\(\frac{4}{5}=\frac{X}{35}\)
\(\Rightarrow\)\(X=35\times\frac{4}{5}\)
\(\Rightarrow\)\(X=28\)
\(b,\)\(\frac{12}{15}=\frac{72}{X}\)
\(\Rightarrow\)\(X=72\div\frac{12}{15}\)
\(\Rightarrow\)\(X=90\)
\(c,\)\(\frac{125}{300}=\frac{5}{X}\)
\(\Rightarrow\)\(\frac{5}{12}=\frac{5}{X}\)
\(\Rightarrow\)\(X=12\)
\(d,\)\(\frac{X}{9}=\frac{36}{54}\)
\(\Rightarrow\)\(\frac{X}{9}=\frac{6}{9}\)
\(\Rightarrow\)\(X=6\)
A28/35 b72/90 c5/12 d 36/54
A ) 4/5 = 28/35
B) 12/15 = 72/90
C) 125/300 = 5/12
D) 6/9 = 36/54
4/5 = 28/35
12/15 = 72/90
125/300 = 5/12
6/9 = 36/54
khó thế nhờ ?
4/5 = 28/35
12/15 = 72/90
125/300 = 5/12
6/9 = 36/54
35000000 NHÂN 8756 +9<48735467844e9