Question

Answer 1

a, x + \(\dfrac{1}{4}\) = \(\dfrac{2}{8}\) + \(\dfrac{3}{8}\)

    x + \(\dfrac{1}{4}\) = \(\dfrac{5}{8}\)

          x  = \(\dfrac{5}{8}\) - \(\dfrac{1}{4}\)

          x  = \(\dfrac{3}{8}\)

b, 125 x 48 : 10 - 345

= 6000 : 10 - 345

= 600 - 345

= 255

Answer 2

a) Tìm x :

\(x+\dfrac{1}{4}=\dfrac{2}{8}+\dfrac{3}{8}\)

\(x+\dfrac{1}{4}=\dfrac{5}{8}\)

\(x=\dfrac{5}{8}-\dfrac{1}{4}\)

\(x=\dfrac{3}{8}\)

b) Tính giá trị biểu thức

\(125\)x\(48:10-345\)

\(\left(125x48\right):10-345\)

\(6000:10-345\)

\(\left(6000:10\right)-345\)

\(600-345\)

\(255\)

Answer 3

a) x + 1/4 = 2/8 + 3/8

x = 5/8 - 1/4

x = 3/8

b) 125 x 48 : 10 - 345

= 6000 : 10 - 345

= 600 - 345

= 255