Câu hỏi của Trần Thị Hải Vân

Question

Tính giá trị của biểu thức a,5/12+3/4+1/3 b,1/4+3/7+11/14 c, 1/4+3/12+12/36

subjects · Accepted Answer

Câu a :

$\dfrac{5}{12}+\dfrac{3}{4}+\dfrac{1}{3}\
=\dfrac{5}{12}+\dfrac{9}{12}+\dfrac{4}{12}=\dfrac{3}{2}$

câu b :

$\dfrac{1}{4}+\dfrac{3}{7}+\dfrac{11}{14}\
=\dfrac{7}{28}+\dfrac{12}{28}+\dfrac{22}{28}=\dfrac{41}{28}$

câu c :

$\dfrac{1}{4}+\dfrac{3}{12}+\dfrac{12}{36}\
=\dfrac{3}{12}+\dfrac{3}{12}+\dfrac{4}{12}\
=\dfrac{10}{12}=\dfrac{5}{6}$Câu trả lời: Câu a :

$\dfrac{5}{12}+\dfrac{3}{4}+\dfrac{1}{3}\
=\dfrac{5}{12}+\dfrac{9}{12}+\dfrac{4}{12}=\dfrac{3}{2}$

câu b :

$\dfrac{1}{4}+\dfrac{3}{7}+\dfrac{11}{14}\
=\dfrac{7}{28}+\dfrac{12}{28}+\dfrac{22}{28}=\dfrac{41}{28}$

câu c :

$\dfrac{1}{4}+\dfrac{3}{12}+\dfrac{12}{36}\
=\dfrac{3}{12}+\dfrac{3}{12}+\dfrac{4}{12}\
=\dfrac{10}{12}=\dfrac{5}{6}$