(3/5+17/3):121/19+(-17/3+2/5):121/19 = ?
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
ND
3
VT
6 tháng 3 2023
\(a,\dfrac{9}{17}+\dfrac{15}{4}=\dfrac{36}{68}+\dfrac{255}{68}=\dfrac{291}{68}\\ b,\dfrac{19}{121}-\dfrac{1}{11}=\dfrac{19}{121}-\dfrac{11}{121}=\dfrac{8}{121}\\ c,\dfrac{4}{15}+3=\dfrac{4}{15}+\dfrac{45}{15}=\dfrac{49}{15}\\ d,3-\dfrac{5}{9}=\dfrac{27}{9}-\dfrac{5}{9}=\dfrac{22}{9}\)
NK
6 tháng 3 2023
\(a,\dfrac{9}{17}+\dfrac{15}{4}=\dfrac{36}{68}+\dfrac{255}{68}=\dfrac{291}{68}\)
\(b,\dfrac{19}{121}-\dfrac{1}{11}=\dfrac{19}{121}-\dfrac{11}{121}=\dfrac{8}{121}\)
\(c,\dfrac{4}{15}+3=\dfrac{4}{15}+\dfrac{3}{1}=\dfrac{4}{15}+\dfrac{45}{15}=\dfrac{49}{15}\)
\(d,3-\dfrac{5}{9}=\dfrac{3}{1}-\dfrac{5}{9}=\dfrac{27}{9}-\dfrac{5}{9}=\dfrac{22}{9}\)
\(\left(\frac{3}{5}+\frac{17}{3}\right):\frac{121}{19}+\left(\frac{-17}{3}+\frac{2}{5}\right):\frac{121}{19}\)
\(=\left(\frac{3}{5}+\frac{17}{3}\right).\frac{19}{121}+\left(\frac{-17}{3}+\frac{2}{5}\right).\frac{19}{121}\)
\(=\frac{19}{121}.\left[\left(\frac{3}{5}+\frac{17}{3}\right)+\left(\frac{-17}{3}+\frac{2}{5}\right)\right]\)
\(=\frac{19}{121}.\left[\frac{3}{5}+\frac{17}{3}+\left(\frac{-17}{3}\right)+\frac{2}{5}\right]\)
\(=\frac{19}{121}.\left[\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{-17}{3}+\frac{17}{3}\right)\right]\)
\(=\frac{19}{121}.\left[1+0\right]\)
\(=\frac{19}{121}.1\)
\(=\frac{19}{121}\)
\(\frac{121}{19}\)