Question

Tính:{hỗn số}

a]4  2/3 - 2  3/4

Answer 1

`@` `\text {Ans}`

`\downarrow`

`a)`

\(4\dfrac{2}{3}-2\dfrac{3}{4}\)

`=`\(\dfrac{3\times4+2}{3}-\dfrac{4\times2+3}{4}\)

`=`\(\dfrac{14}{3}-\dfrac{11}{4}=\dfrac{23}{12}\)

Answer 2

\(4\dfrac{2}{3}=\dfrac{14}{3}\)

\(2\dfrac{3}{4}=\dfrac{11}{4}\)

=> \(\dfrac{14}{3}-\dfrac{11}{4}=\dfrac{56}{12}-\dfrac{33}{12}=\dfrac{23}{12}\)

Answer 3

\(4\dfrac{2}{3}-2\dfrac{3}{4}\)

\(=\dfrac{14}{3}-\dfrac{11}{4}\)

\(=\dfrac{56}{12}-\dfrac{33}{12}\)

\(=\dfrac{23}{12}\)

Answer 4