Question

Tính giá trị biểu thức 

1/2 x 1/3 + 3/4 

3/7 - 2/7 : 2/3

Answer 1

\(\dfrac{1}{2}\times\dfrac{1}{3}+\dfrac{3}{4}\)

\(=\dfrac{1}{6}+\dfrac{3}{4}\)

\(=\dfrac{2}{12}+\dfrac{9}{12}\)

\(=\dfrac{11}{12}\)

____________________________

\(\dfrac{3}{7}-\dfrac{2}{7}:\dfrac{2}{3}\)

\(=\dfrac{3}{7}-\dfrac{2}{7}\times\dfrac{3}{2}\)

\(=\dfrac{3}{7}-\dfrac{3}{7}\)

\(=0\)

Chúc bạn học tốt

Answer 2

1/2 x 1/3 + 3/4 = 1/6 + 3/4 = 4/24 + 18/24 = 22/24 = 11/12
3/7 - 2/7 : 2/3 = 3/7 - 2/7 x 3/2 = 3/7 - 3/7 = 0

Answer 3

 

1​×31​+43​

=16+34=61​+43​

=212+912=122​+129​

=1112=1211​

____________________________

37−27:2373​−72​:32​

=37−27×32=73​−72​×23​

=37−37=73​−73​

$=0$