\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)=17.\left(\dfrac{10}{34}-\dfrac{1}{34}+\dfrac{17}{34}\right)=17.\dfrac{26}{34}=13\)

\(#PaooNqoccc\)

\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{10}{34}-\dfrac{1}{35}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{9}{34}+\dfrac{1}{2}\right)\)

\(=17.\left(\dfrac{9}{34}+\dfrac{17}{34}\right)\)

\(=17.\dfrac{13}{17}\)

\(=13\)

\(17.\left(\dfrac{5}{17}-\dfrac{1}{34}+\dfrac{1}{2}\right)\\ =\dfrac{17.5}{17}-\dfrac{17}{34}+\dfrac{17}{2}\\ =5-\dfrac{1}{2}+\dfrac{17}{2}\\ =\dfrac{9}{2}+\dfrac{17}{2}\\ =\dfrac{26}{2}=13\)

đề??

a) \(\dfrac{4}{5}-\left(\dfrac{1}{5}+\dfrac{1}{3}\right)=\dfrac{4}{5}-\left(\dfrac{3}{15}+\dfrac{5}{15}\right)=\dfrac{4}{5}-\dfrac{8}{15}=\dfrac{12}{15}-\dfrac{8}{15}=\dfrac{4}{15}\)

b) \(\dfrac{12}{7}-\left(\dfrac{3}{14}-1\right)=\dfrac{12}{7}-\left(-\dfrac{11}{14}\right)=\dfrac{12}{7}+\dfrac{11}{14}=\dfrac{5}{2}\)

c) \(\dfrac{11}{2}-9\cdot\left(\dfrac{7}{5}-\dfrac{1}{2}\right)=\dfrac{11}{2}-9\cdot\dfrac{9}{10}=\dfrac{11}{2}-\dfrac{81}{10}=\dfrac{55}{10}-\dfrac{81}{10}=-\dfrac{13}{5}\)

d) \(3\times9\left(\dfrac{4}{7}+\dfrac{3}{5}\right)=27\times\dfrac{41}{35}=\dfrac{1107}{35}\)

e) \(\left(\dfrac{1}{3}-\dfrac{1}{5}\right):2=\left(\dfrac{5}{15}-\dfrac{3}{15}\right):2=\dfrac{2}{15}:2=\dfrac{2}{15}\times\dfrac{1}{2}=\dfrac{1}{15}\)

f) \(\dfrac{123}{34}:\dfrac{1}{17}-\dfrac{21}{34}:\dfrac{1}{17}=\left(\dfrac{123}{34}-\dfrac{21}{34}\right):\dfrac{1}{17}=3:\dfrac{1}{17}=3\times17=51\)

ko hiểu đề cho lắm

Muốn dc giúp đỡ chất lượng thì làm ơn viết bằng công thức toán

Tính giá trị biểu thức A = \(8\dfrac{3}{17}.5\dfrac{1}{4}+3\dfrac{14}{17}.5\dfrac{1}{4}:\left(1\dfrac{14}{17}-1\dfrac{1}{34}\right).34\)

Đúng hay sai đề nhớ nói 1 tiếng ==''

7/3 nhé

phép tính cứ làm bình thường nha nhân chia trước cộng trừ sau , cái gì trung đặt ra ngoài .xin lỗi vì vt hơ mỏi tay nên mik vt lời thôi nha 

~ hok tốt ~

cút m*** đi!!

câu cuối nè 7/9-2/9:x=1/6

5/9:x=1/6

x=5/9:1/6

x=10/3

(-13/31 + -18/31) : 5/17 . 25/34 = -1 . 17/5 . 25/34

                                             = -17/5 . 25/34

                                             = -425/170

                                             = -5/2

$#Shả$

`A)=5/17xx(15/34+19/34)`

`=5/17xx1=5/17`

`B)=(13/12+7/12)+1/3`

`=5/3+1/3=2`