Question

4/12+3/8-5/15

Answer 1

4/12 + 3/8 - 5/15

= 1/3 + 3/8 - 1/3

= 8/24 + 9/24 - 8/24

= 9/24 = 3/8

Answer 2

\(\dfrac{4}{12}+\dfrac{3}{8}+\dfrac{5}{15}=\dfrac{17}{24}+\dfrac{5}{15}=\dfrac{25}{24}\)

Answer 3

 

4/12+3/8−5/15=3/84/12+3/8−5/15=3/8.

4/12 + 3/8 - 5/15

= 1/3 + 3/8 - 1/3

= 8/24 + 9/24 - 8/24

= 9/24 = 3/8

 

theo tôi bạn chỉ cần quy đồng lại cùng mẫu và tính thôi,

Answer 4

\(\dfrac{4}{12}+\dfrac{3}{8}-\dfrac{5}{15}=\dfrac{1}{3}+\dfrac{3}{8}-\dfrac{1}{3}=\dfrac{3}{8}\)

(mình rút gọn luôn vì 1/3 - 1/3 = 0)