Rút gọn các phân số sau thành phân số tối giản: $\frac{1.2.5+3.4.15+4.8.20+7.14.350}{2.5.11+6.10.33+8.20.44+14.35.770}$

2 câu trả lời

$@Xà Phòng$

$\dfrac{1.2.5+3.4.15+4.8.20+7.14.350}{2.5.11+6.10.33+8.20.44+14.35.770}$

= $\dfrac{1.10+3.60+160.4+7.14.35.10}{10.11+60.33+160.44+14.35.10.77}$

= $\dfrac{1+3+4+7}{11+33+44+77}$

= $\dfrac{1+1+1+1}{11+11+11+11}$ 

`= 4/44`

`= 1/11` 

$\dfrac{1.2.5+3.4.15+4.8.20+7.14.350}{2.5.11+6.10.33+8.20.44+14.35.770}$

= $\dfrac{1.10+3.60+160.4+7.14.35.10}{10.11+60.33+160.44+14.35.10.77}$

= $\dfrac{1+3+4+7}{11+33+44+77}$

= $\dfrac{1+1+1+1}{11+11+11+11}$

= $\dfrac{4}{44}$

= $\dfrac{1}{11}$

XIN HAY NHẤT !