108×100+94×200 trên 74×76+252×38 36×48+18×104 trên 12×24+36×42 Giúp mik nha chữ”trên” là dấu gạch phân số 03/10/2021 Bởi Everleigh 108×100+94×200 trên 74×76+252×38 36×48+18×104 trên 12×24+36×42 Giúp mik nha chữ”trên” là dấu gạch phân số
$\dfrac{108×100+94×200}{74×76+252×38}$ $=\dfrac{108×100+94×2×100}{74×2×38+252×38}$ $=\dfrac{108×100+188×100}{148×38+252×38}$ $=\dfrac{100×(108+188)}{38×(148+252)}$ $=\dfrac{100×296}{38×400}$ $=\dfrac{296}{38×4}$ $=\dfrac{296}{152}$ $=\dfrac{37}{19}$ $\tiny$ $\dfrac{36×48+18×104}{12×24+36×42}$ $=\dfrac{18×2×48+18×104}{12×24+12×3×42}$ $=\dfrac{18×96+18×104}{12×24+12×126}$ $=\dfrac{18×(96+104)}{12×(24+126)}$ $=\dfrac{18×200}{12×150}$ $=\dfrac{3×4}{2×3}$ $=\dfrac{4}{2}$ $=2$ Bình luận
$\dfrac{108×100+94×200}{74×76+252×38}$
$=\dfrac{108×100+94×2×100}{74×2×38+252×38}$
$=\dfrac{108×100+188×100}{148×38+252×38}$
$=\dfrac{100×(108+188)}{38×(148+252)}$
$=\dfrac{100×296}{38×400}$
$=\dfrac{296}{38×4}$
$=\dfrac{296}{152}$
$=\dfrac{37}{19}$
$\tiny$
$\dfrac{36×48+18×104}{12×24+36×42}$
$=\dfrac{18×2×48+18×104}{12×24+12×3×42}$
$=\dfrac{18×96+18×104}{12×24+12×126}$
$=\dfrac{18×(96+104)}{12×(24+126)}$
$=\dfrac{18×200}{12×150}$
$=\dfrac{3×4}{2×3}$
$=\dfrac{4}{2}$
$=2$