Question

2/3 +1/5 

3/7 + 9/14

5/12 + 3/4

3/5 + 5/6

Answer 1

`@` `\text {Ans}`

`\downarrow`

`2/3+1/5 = 10/15 + 3/15 = 13/15`

`3/7+9/14 = 6/14 + 9/14 = 15/14`

`5/12 + 3/4 = 5/12 + 9/12 = 14/12 = 7/6`

`3/5+5/6 = 18/30 + 25/30 = 43/30 `

Answer 2

\(a,\dfrac{2}{3}+\dfrac{1}{5}=\dfrac{10+3}{15}=\dfrac{13}{15}\)

\(b,\dfrac{3}{7}+\dfrac{9}{14}=\dfrac{6}{14}+\dfrac{9}{14}\)

\(=\dfrac{15}{14}\)

\(c,\dfrac{5}{12}+\dfrac{3}{4}=\dfrac{5}{12}+\dfrac{9}{12}\)

\(=\dfrac{14}{12}=\dfrac{7}{6}\)

\(d,\dfrac{3}{5}+\dfrac{5}{6}\) \(=\dfrac{18+25}{30}=\dfrac{43}{30}\)

Answer 3

\(\dfrac{2}{3}+\dfrac{1}{5}=\dfrac{10}{15}+\dfrac{3}{15}=\dfrac{13}{15}\)

\(\dfrac{3}{7}\) + \(\dfrac{9}{14}\) = \(\dfrac{6}{14}\) + \(\dfrac{9}{14}\) = \(\dfrac{15}{14}\)

 \(\dfrac{5}{12}\) + \(\dfrac{3}{4}\) = \(\dfrac{5}{12}+\dfrac{9}{12}\) = \(\dfrac{14}{12}\) = \(\dfrac{7}{6}\) 

\(\dfrac{3}{5}+\dfrac{5}{6}=\dfrac{18}{30}+\dfrac{25}{30}=\dfrac{43}{30}\)

Answer 4

1   .$13/15$

$2\; .15/14$

$3\; .7/6$

$4\; .\; 43/30$

Answer 5

ai trả lời nhanh giúp mình với mn ơi

 

Answer 6

mnnnnnnnnnnn

Answer 7

$2/3+1/5=10/15+3/15=13/15$

$3/7+9/14=6/14+9/14=15/14$

$5/12+3/4=5/12+9/12=14/12=7/6$

$3/5+5/6=18/30+25/30=43/30$