Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) \(2.04:\left(-3.12\right)=\dfrac{204}{-312}=\dfrac{-17}{26}\)
b) \(\left(-1\dfrac{1}{2}\right):1.25=\dfrac{-3}{2}:\dfrac{5}{4}=\dfrac{-3}{2}\cdot\dfrac{4}{5}=\dfrac{-12}{10}=\dfrac{-6}{5}\)
c) \(4:5\dfrac{3}{4}=4:\dfrac{23}{4}=4\cdot\dfrac{4}{23}=\dfrac{16}{23}\)
d) \(10\dfrac{3}{7}:5\dfrac{3}{14}=\dfrac{73}{7}:\dfrac{73}{14}=\dfrac{2}{1}\)
a) \(\dfrac{0.7}{1.5}=\dfrac{7}{15}\)
b) \(\dfrac{11}{5}:\dfrac{3}{4}=\dfrac{2.2}{0.75}=\dfrac{44}{15}\)
c) \(3:0.02=3\cdot50=\dfrac{150}{1}\)
d) \(2.7:0.42=\dfrac{45}{7}\)
a) \(3,7:4,5=\dfrac{3,7}{4,5}=\dfrac{37}{45}\)
b) \(2\dfrac{1}{3}:4\dfrac{2}{3}=\dfrac{7}{3}:\dfrac{14}{3}=\dfrac{7}{3}\times\dfrac{3}{14}=\dfrac{1}{2}\)
c) \(\dfrac{3}{8}:0,7=\dfrac{3}{8}:\dfrac{7}{10}=\dfrac{3}{8}\times\dfrac{10}{7}=\dfrac{15}{28}\)
d) \(5\dfrac{1}{7}:2\dfrac{1}{3}=\dfrac{36}{7}:\dfrac{7}{3}=\dfrac{36}{7}\times\dfrac{3}{7}=\dfrac{108}{49}\)
a. 2,04 : (-3,12)
= 204/100 : (-312/100)
= 51/25 : (-78/25)
= 51/25 . (-25/78)
= -51/78
= -17/26
b. \(\left(-1\frac{1}{2}\right):1,25=\left(-\frac{3}{2}\right):\frac{125}{100}=\left(-\frac{3}{2}\right):\frac{5}{4}=\left(-\frac{3}{2}\right).\frac{4}{5}=-\frac{6}{5}\)
c. \(4:5\frac{3}{4}=4:\frac{23}{4}=4.\frac{4}{23}=\frac{16}{23}\)
d. \(10\frac{3}{7}:5\frac{3}{14}=\frac{73}{7}:\frac{73}{14}=\frac{73}{7}.\frac{14}{73}=\frac{14}{7}=\frac{2}{1}\)
a. \(\frac{10}{12}\div\frac{6}{25}=\frac{5}{6}\times\frac{25}{6}=\frac{125}{36}\)
b. \(1,7\div2,85=\frac{1,7}{2,85}=\frac{1,7\times100}{2,85\times100}=\frac{170}{285}\)
c, \(\frac{1}{5}\div0,25=\frac{1}{5}\div\frac{1}{4}=\frac{1}{5}\times4=\frac{4}{5}\)
d, a/b : c/d = (a*b*d) : (c*b*d)