Question

Rút gọn :

\(\dfrac{49+4.49}{49}\)

Answer 1

Ta có :

\(\dfrac{49+4.49}{49}=\dfrac{49\left(1+4\right)}{49}=\dfrac{49.5}{49}=\dfrac{1.5}{1}=5\)

Answer 2

\(\dfrac{49+4\cdot49}{49}\)=\(\dfrac{49\cdot1+4\cdot49}{49}\)=\(\dfrac{49\cdot\left(1+4\right)}{49}\)=\(\dfrac{1\cdot\left(1+4\right)}{1}\)=\(\dfrac{5}{1}\)=5

Answer 3

\(\dfrac{49+4.49}{49}=\dfrac{49.\left(1+49\right)}{49}=\dfrac{49.50}{49}=50\)

Answer 4

\(\dfrac{49+4.49}{49}=\dfrac{49.\left(1+4\right)}{49}=\dfrac{49.5}{49}=5\)