\(\frac{1.2+3.6+5.10+7.14}{2.3+6.9+10.15+14.21}\)
\(=\frac{1.2+3.6+5.10+7.14}{1.2.3+3.6.3+5.10.3+7.14.3}\)
\(=\frac{1.2+3.6+5.10+7.14}{3.\left(1.2+3.6+5.10+7.14\right)}\)
\(=\frac{1}{3}\)
Rút gọn phân số:
\(\frac{2.3+6.9+10.15+14.21}{2.5+6.15+10.25+14.35}\)
Làm giúp mk bài này nha!Cảm ơn mn nhiều:3
Rút gọn.
a,1.2+2.4+3.6+4.8+5.10 / 3.4+6.8+9.12+12.16+15.20
b, 12.13+24.26+36.39 / 24.26+48.52+72.78
c, 2.3+4.6+14.21 / 3.5+6.10+21.35
giúp mk nhé!ai nhanh mk k
Rút gọn phân số:
\(\frac{1.2+1.4+3.6+4.8}{2.3+4.6+6.9+8.12}\)
Làm giúp mk bài này nha!Cảm ơn mn nhiều!
Tính A= \(\frac{1}{3.7}+\frac{1}{7.14}+\frac{1}{14.21}+...+\frac{1}{140.150}\)
\(\frac{1.2+2.4+3.6+4.8+5.10}{3.4+6.8+9.12+12.16+15.20}\)
Tính \(y=\frac{1.2+2.4+3.6+4.8+5.10}{3.4+6.8+9.12+12.16+15.20}\)
Tính nhanh
\(\frac{1.2+2.4+3.6+4.8+5.10}{3.4+6.8+9.12+12.16+15.20}\)
\(\frac{1.2+2.4+3.6+4.8+5.10+6.12}{3.4+6.8+9.12+12.16+15.20+18.24}\)
giúp mình nha!!!
tính
\(\frac{1.2+2.4+3.6+4.8+5.10}{3.4+6.8+9.12+12.16+15.20}\)