15.8+15/5.9
=15.(8+1)/5.9
=15.9/5.9
=3.5.9/5.9
=3(chia cả tử và mẫu cho 5.9)
\(\frac{15.8+15}{5.9}=\frac{15.\left(8+1\right)}{5.9}=\frac{15.9}{5.9}=3\)
\(\frac{15.8+15}{5.9}=\frac{15.\left(8+1\right)}{45}=\frac{15.9}{15.3}=\frac{9}{3}=3\)
15.8+15/5.9
=15.(8+1)/5.9
=15.9/5.9
=3.5.9/5.9
=3(chia cả tử và mẫu cho 5.9)
\(\frac{15.8+15}{5.9}=\frac{15.\left(8+1\right)}{5.9}=\frac{15.9}{5.9}=3\)
\(\frac{15.8+15}{5.9}=\frac{15.\left(8+1\right)}{45}=\frac{15.9}{15.3}=\frac{9}{3}=3\)
Quy đồng mẫu các phân số sau:
a) \(\frac{4.5+4.11}{8.7-4.3}\) và \(\frac{15.8-10.7}{5.6+20.3}\)
b) \(4\frac{15}{105};3\frac{128}{144};2\frac{63}{324}\)
Rút gọn
\(\frac{-15.8+10.7}{5.6+20.3}\)
Rút gọn :
\(\frac{15.8+15.4}{12.3}\)
Ai nhanh mk k cho
Rút gọn các phân số sau rồi quy đồng :
\(\frac{4.5+4.11}{8.7-4.3};\frac{-15.8+10.7}{5.6+20.3};\frac{2^4.5^2.7}{2^3.5.11.7^2}\)
\(\frac{3}{1.5}+\frac{3}{5.9}+\frac{3}{9.13}+...+\frac{3}{21.25}\)
\(M=\frac{1}{3.4}+\frac{7}{3.4}+\frac{2}{3.5}+\frac{14}{5.9}-\frac{4}{9.13}=?\)
2012 - (( 12 . 9 - 4.7): 10 + ( 5.9+ 3.6) : 9) . 15
b) \(x+\frac{4}{5.9}+\frac{4}{9.13}+...+\frac{4}{41.45}=1\)
\(C=\frac{5}{1.5}+\frac{5}{5.9}+\frac{5}{9.13}+...+\frac{5}{101.105}\)