Question

2.3+4.6+14.21/3.5+6.10+21.35
Giải dùm mình nhé, mai mình nộp rồi, mình cảm ơn trước!!

Answer 1

\(\dfrac{2.3+4.6+14.21}{3.5+6.10+21.35}\)

= \(\dfrac{2.3+8.3+98.3}{3.5+3.20+245.3}\)

= \(\dfrac{3.\left(2+8+98\right)}{3.\left(5+20+245\right)}\)

= \(\dfrac{3.108}{3.270}\)

= \(\dfrac{108}{270}\) = \(\dfrac{2}{5}\)