Question

giúp mình nha !

a. 4 - 2/3 - 10/24     b. 12/7 x 3/4 : 3/14     c. 2 + 5/2 : 18

Answer 1

Answer 2

\(a,\)

\(4-\dfrac{2}{3}-\dfrac{10}{24}=\dfrac{4}{1}-\dfrac{2}{3}-\dfrac{10}{24}=\dfrac{96}{24}-\dfrac{16}{24}-\dfrac{10}{24}=\dfrac{80}{24}-\dfrac{10}{24}=\dfrac{70}{24}=\dfrac{35}{12}\)

 

Answer 3

\(b,\)

\(\dfrac{12}{7}\times\dfrac{3}{4}\div\dfrac{3}{14}=\dfrac{12}{7}\times\dfrac{3}{4}\times\dfrac{14}{3}=\dfrac{12\times3\times14}{7\times4\times3}=\dfrac{6}{1}=6\)

Answer 4

\(c,\) \(2+\dfrac{5}{2}\div18=\dfrac{2}{1}+\dfrac{5}{2}\div\dfrac{18}{1}=\dfrac{2}{1}+\dfrac{5}{2}\times\dfrac{1}{18}=\dfrac{2}{1}+\dfrac{5}{36}=\dfrac{78}{36}+\dfrac{5}{36}=\dfrac{78+5}{36}=\dfrac{83}{36}\)

Answer 5