\(\frac{15}{25}=\frac{15:5}{25:5}=\frac{3}{5}\); \(\frac{6}{21}=\frac{6:3}{21:3}=\frac{2}{7}\)
\(\frac{3}{5}+\frac{2}{7}=\frac{31}{35}\)
\(\frac{15}{25}+\frac{6}{21}=\frac{3}{5}+\frac{2}{7}=\frac{21}{35}+\frac{10}{35}=\frac{31}{35}\)
15/25+6/21
ta có:
15/25=15:5/25:5=3/5
6/21=6:3/21:3=2/7
3/5+2/7=31/35
tick nha
15/25+6/21
ta có:
15/25=15:5/25:5=3/5
6/21=6:3/21:3=2/7
3/5+2/7=31/35
Rút gọn : 15/25=3/5+6/21=3/7
=3/5+3/7
=21/35+15/35
=36/35
Học tốt nha !
Rút gọn : 15/25=3/5+6/21=2/7
=3/5+2/7
=21/35+10/35
=31/35
Học tốt nha bạn!
TINH ROI RUT GON
