Question

10) tính giá trị biểu thức 

a) \(\dfrac{1}{2}\) x \(\dfrac{3}{4}\) + \(\dfrac{1}{2}\)

B) \(\dfrac{3}{4}\) : \(\dfrac{2}{3}\) - \(\dfrac{1}{6}\)

( ghi chi tiết giúp mk với )

 

Answer 1

3/8 + 1/2 = 7/8

9/8 - 1/6 = 23/24

Answer 2

a: =1/2(3/4+1)=1/2x7/4=7/8

b: =9/8-1/6=27/24-4/24=23/24

Answer 3

a.\(\dfrac{1}{2}\times\dfrac{3}{4}+\dfrac{1}{2}=\dfrac{1}{2}\times\left(\dfrac{3}{4}+1\right)=\dfrac{1}{2}\times\dfrac{7}{4}=\dfrac{7}{8}\)

b.\(\dfrac{3}{4}:\dfrac{2}{3}-\dfrac{1}{6}=\dfrac{3}{4}\times\dfrac{3}{2}-\dfrac{1}{6}=\dfrac{9}{8}-\dfrac{1}{6}=\dfrac{23}{24}\)

Answer 4

a) \(\dfrac{1}{2}\times\dfrac{3}{4}+\dfrac{1}{2}=\dfrac{3}{8}+\dfrac{1}{2}=\dfrac{3}{8}+\dfrac{4}{8}=\dfrac{7}{8}\)

b) \(\dfrac{3}{4}:\dfrac{2}{3}-\dfrac{1}{6}=\dfrac{3}{4}\times\dfrac{3}{2}-\dfrac{1}{6}=\dfrac{9}{8}-\dfrac{1}{6}=\dfrac{27}{24}-\dfrac{4}{24}=\dfrac{23}{24}\)

Answer 5

a) 3/8 + 1/2

= 3/8 + 4/8

= 7/8

b) 9/8 - 1/6

= 27/24 - 4/24

= 23/24

 

Answer 6

3/8 + 1/2 = 7/8

9/8 - 1/6 = 23/24

Answer 7

\(a\dfrac{3}{8}+\dfrac{1}{2}=\dfrac{7}{8}\\ b,\dfrac{3}{4}.\dfrac{3}{2}-\dfrac{1}{6}=\dfrac{9}{8}-\dfrac{1}{6}=\dfrac{23}{24}\)

Answer 8

a, 1/2 x 3/4 + 1/2

=     3/8       + 1/2

=         7/8

 

b, 3/4 : 2/3 - 1/6

=  9/8        -1/6

=         23/24