Các câu hỏi tương tự
tính nhanh
A =\(\frac{-5}{7}+\frac{3}{4}+\frac{-1}{5}+\frac{-2}{7}+\frac{1}{4}\)
B = \(\frac{-4}{12}+\frac{18}{45}+\frac{-6}{9}+\frac{-21}{35}+\frac{6}{30}\)
Bài 1 : Tính giá trị của biểu thức
\(\frac{10.25+8}{10+25-8}=\frac{2+\frac{2}{5}-\frac{2}{7}+\frac{2}{2015}-\frac{2}{9}}{\frac{4}{2015}-\frac{4}{9}+\frac{4}{5}-\frac{4}{7}+4}\)
Tìm tỉ số frac{A}{B}biếta,Afrac{4}{7.31}+frac{6}{7.41}+frac{9}{10.41}+frac{7}{10.57}Bfrac{7}{19.31}+frac{5}{19.43}+frac{3}{23.43}+frac{11}{23.57}b,Afrac{1}{2}+frac{1}{3}+frac{1}{4}+...+frac{1}{2017}Bfrac{2016}{1}+frac{2015}{2}+frac{2014}{3}+...+frac{1}{2016}GIẢI RÕ NHA ! NHANH NHANH MÌNH CẦN GẤP !+_+
Đọc tiếp
Tìm tỉ số \(\frac{A}{B}\)biết
a,\(A=\frac{4}{7.31}+\frac{6}{7.41}+\frac{9}{10.41}+\frac{7}{10.57}\)
\(B=\frac{7}{19.31}+\frac{5}{19.43}+\frac{3}{23.43}+\frac{11}{23.57}\)
b,\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2017}\)
\(B=\frac{2016}{1}+\frac{2015}{2}+\frac{2014}{3}+...+\frac{1}{2016}\)
GIẢI RÕ NHA ! NHANH NHANH MÌNH CẦN GẤP !+_+
Tìm tỉ số frac{A}{B}biếta,Afrac{4}{7.31}+frac{6}{7.41}+frac{9}{10.41}+frac{7}{10.57}Bfrac{7}{19.31}+frac{5}{19.43}+frac{3}{23.43}+frac{11}{23.57}b,Afrac{1}{2}+frac{1}{3}+frac{1}{4}+...+frac{1}{2017}Bfrac{2016}{1}+frac{2015}{2}+frac{2014}{3}+...+frac{1}{2016}GIẢI RÕ NHA ! NHANH NHANH MÌNH CẦN GẤP !+_+
Đọc tiếp
Tìm tỉ số \(\frac{A}{B}\)biết
a,\(A=\frac{4}{7.31}+\frac{6}{7.41}+\frac{9}{10.41}+\frac{7}{10.57}\)
\(B=\frac{7}{19.31}+\frac{5}{19.43}+\frac{3}{23.43}+\frac{11}{23.57}\)
b,\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2017}\)
\(B=\frac{2016}{1}+\frac{2015}{2}+\frac{2014}{3}+...+\frac{1}{2016}\)
GIẢI RÕ NHA ! NHANH NHANH MÌNH CẦN GẤP !+_+
Tính:
\(\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+\frac{1}{5}-\frac{1}{6}+\frac{1}{7}-\frac{1}{8}+.....+\frac{1}{2015}-\frac{1}{2016}+\frac{1}{2017}.\)
\(\frac{5-\frac{5}{3}+\frac{5}{9}-\frac{5}{27}}{8-\frac{8}{3}+\frac{8}{9}-\frac{8}{27}}:\frac{15-\frac{15}{11}+\frac{15}{121}}{16-\frac{16}{11}+\frac{16}{121}}.\)
\(\frac{11^4.6-11^5}{11^4-11^5}:\frac{9^8.3-9^9}{9^8.5+9^8.7}\)
\(\frac{3}{5}:\left(\frac{-1}{5}-\frac{1}{6}\right)+\frac{3}{5}:\left(\frac{-1}{3}-1\frac{1}{15}\right)\)
\(\left(\frac{1}{2}-\frac{13}{14}\right):\frac{5}{7}-\left(-\frac{2}{21}+\frac{1}{7}\right):\frac{5}{7}\)
\(\frac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
\(\left(\frac{1}{2}+\frac{2015}{2016}+\frac{2016}{2017}+1\right)\left(\frac{2105}{2016}+\frac{2016}{2017}+\frac{7}{22}\right)-\left(\frac{1}{2}+\frac{2015}{2016}+\frac{2016}{2017}\right)\left(\frac{2015}{2016}+\frac{2016}{2017}+\frac{7}{22}+1\right)\)
1 tính
a \(\left(\frac{9}{14}-\frac{9}{21}\right):\left(\frac{4}{5}+\frac{5}{6}\right)\)
b \(\frac{7}{10}-\frac{-3}{4}+\frac{-5}{6}-\frac{1}{5}+\frac{-2}{3}\)
c \(\left(-2\right)^2.\left(\frac{3}{4}-0,25\right):\left(2\frac{1}{4}-1\frac{1}{6}\right)\)
d \(-\frac{1}{7}.\left(9\frac{1}{2}-0,75\right):\frac{2}{7}+0,625:1\frac{2}{3}\)
Tính nhanh :
A=\(21\frac{4}{11}-\left(1\frac{3}{5}+7\frac{4}{11}\right)\)
B=\(\left(7\frac{8}{9}+2\frac{3}{13}\right)-\left(4\frac{8}{9}-7\frac{10}{13}\right)\)
C= \(\frac{-3}{5}+\frac{2}{7}+\frac{-3}{7}\cdot\frac{3}{5}+\frac{-3}{7}\)