Question

[*Liz*-*cute* !]

Các bn ơi giúp mk câu này vs lun nha

Câu 1: Rút gọn:

a, \(\dfrac{32}{12}\) =

b, \(\dfrac{-26}{156}\)=

c,\(\dfrac{4.7}{9.32}\)=

d,\(\dfrac{2.5.13}{26.35}\)=

e, \(\dfrac{7.6-9.13}{18}\)=

f, \(\dfrac{17.5-17}{3-20}\)=

g, \(\dfrac{49+7.49}{49}\)=

Answer 1

[Đức Huy ABC]

a) \(\dfrac{32}{12}=\dfrac{4.8}{4.3}=\dfrac{8}{3}\)

b) \(\dfrac{-26}{156}=\dfrac{-26}{26.6}=\dfrac{-1}{6}\)

c) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{9.8}=\dfrac{7}{72}\)

d) \(\dfrac{2.5.13}{26.35}\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\)

e)\(\dfrac{7.6-9.13}{18}=\dfrac{42-117}{18}=\dfrac{-75}{18}=\dfrac{-25.3}{6.3}=\dfrac{-25}{6}\)

f) \(\dfrac{17.5-17}{3-20}=\dfrac{17.\left(5-1\right)}{-17}=-4\)

g) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(1+7\right)}{49}=8\)

Answer 2

[Takishima Hotaru]

a, \(\dfrac{32}{12}=\dfrac{8}{3}\)

b, \(\dfrac{-26}{156}=\dfrac{-1}{6}\)

c, \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\)

d,\(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.7.5}=\dfrac{1}{7}\)

e,\(\dfrac{7.6-9.13}{18}=\dfrac{3\left(7.2-3.13\right)}{18}=\dfrac{-25}{6}\)

f ,\(\dfrac{17.5-17}{3-20}=\dfrac{17\left(5-1\right)}{-17}=-4\)

g,\(\dfrac{49+7.49}{49}=\dfrac{49\left(1+7\right)}{49}=8\)