Question

Thực hiện phép tính :

a, 2/3 - 5/7 . 14/25

b, 3/4 + -5/6 - 11/-12

c, (1/2)^2 - 1và1/2 + 0,5 . 12/5 + 5%

d, 1,25 : 15/20 + ( 25% - 5/6 ) : 4và2/3

e, -5/9 + 5/9 : ( 3và1/3 - 1 và2/3 )

Help meeeee! Cíu mình vớiiiiiii 

Answer 1

a: \(=\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{10-6}{15}=\dfrac{4}{15}\)

b: \(=\dfrac{9}{12}-\dfrac{10}{12}+\dfrac{11}{12}=\dfrac{10}{12}=\dfrac{5}{6}\)

c: \(=\dfrac{1}{4}-\dfrac{3}{2}+\dfrac{1}{2}\cdot\dfrac{12}{5}+\dfrac{1}{20}=\dfrac{-5}{4}+\dfrac{6}{5}+\dfrac{1}{20}=0\)

d: \(=\dfrac{1}{25}\cdot\dfrac{20}{15}+\left(\dfrac{1}{4}-\dfrac{5}{6}\right):\dfrac{14}{3}=-\dfrac{43}{600}\)

Answer 2

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