Question

bài 1 : tính

a,\(\dfrac{-6}{11}\): (\(\dfrac{3}{5}.\)\(\dfrac{4}{11}\))

b, \(\dfrac{7}{12}\) + \(\dfrac{5}{12}\) : 6 - \(\dfrac{11}{36}\)

c, ( \(\dfrac{4}{5}\) +\(\dfrac{1}{2}\) ) : ( \(\dfrac{3}{13}\)-\(\dfrac{8}{13}\))

d, ( \(\dfrac{2}{3}\) -\(\dfrac{1}{4}\) +\(\dfrac{5}{11}\) ) : ( \(\dfrac{8}{12}\) +1 - \(\dfrac{7}{11}\) )

bài 2 , tìm x, biết

a, \(\dfrac{-2}{5}\). x +\(\dfrac{4}{3}\) = \(\dfrac{7}{3}\)

b,\(\dfrac{9}{8}\)+\(\dfrac{3}{8}\)-x = 0,125

c,\(\dfrac{3}{4}\): x =\(\dfrac{-7}{12}\)

d,\(\dfrac{3}{8}\)-\(\dfrac{1}{6}\)- x = \(\dfrac{1}{4}\)

e, \(\dfrac{1}{3}\)+\(\dfrac{1}{2}\): x = -4

Answer 1

a;\(\dfrac{-6}{11}\) : \(\dfrac{12}{55}\) = \(\dfrac{-5}{2}\)

b;\(\dfrac{7}{12}\) + \(\dfrac{5}{72}\) - \(\dfrac{11}{36}\) = \(\dfrac{47}{72}\) - \(\dfrac{11}{36}\) = \(\dfrac{25}{72}\)

c;\(\dfrac{13}{10}\) : \(\dfrac{-5}{13}\) = \(\dfrac{-169}{50}\)

d; {\(\dfrac{5}{12}\) + \(\dfrac{5}{11}\) } : { \(\dfrac{5}{3}\) -\(\dfrac{7}{11}\) } = \(\dfrac{115}{132}\) : \(\dfrac{34}{33}\) = \(\dfrac{115}{136}\)

lưu ý mk ko chép đầu bài

Answer 2

mình cần gấp lắm đến chiều mai là phải nộp rùi

giúp mình nha thanks cá bạn trước ko có tâm trạng mà cười nữa

Answer 3

bài này có j khó đâu

Answer 4

mk ko chép đề bài nha

a;\(\dfrac{-2}{5}\) * x = \(\dfrac{7}{3}\) - \(\dfrac{4}{3}\)

\(\dfrac{-2}{5}\) x = 1

x = 1 :\(\dfrac{-2}{5}\)

x = \(\dfrac{-5}{2}\)

b;

\(\dfrac{3}{8}\) - x = 0,125 - \(\dfrac{9}{8}\)

\(\dfrac{3}{8}\) -x = -1

x = \(\dfrac{3}{8}\) - {-1}

x= \(\dfrac{11}{8}\)

c; x= \(\dfrac{3}{4}\) : \(\dfrac{-7}{12}\)

x= \(\dfrac{-9}{7}\)

thôi 2 câu sau tương tự nha

Answer 5

dc chưa mk làm rồi đó

Answer 6

bài này dễ mà

Answer 7

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