0,25x+\(\dfrac{7}{12}\)=\(\dfrac{13}{18}\)-\(\dfrac{1}{9}\)
0,25x+\(\dfrac{7}{12}\)=\(\dfrac{11}{18}\)
0,25x=\(\dfrac{11}{18}\)-\(\dfrac{7}{12}\)
0,25x=\(\dfrac{1}{36}\)
x=\(\dfrac{1}{36}\):0,25
x=\(\dfrac{1}{9}\)
Bài 1: Thực hiện phép tính sau:
\(a,\dfrac{9}{18}-\dfrac{-7}{12}+\dfrac{13}{32}\)
\(b,\dfrac{5}{-8}+\dfrac{14}{25}-\dfrac{6}{10}\)
\(\dfrac{8}{7}:\) (\(\dfrac{2}{9}-\dfrac{1}{18}\) ) + \(\dfrac{7}{8}:\) (\(\dfrac{1}{36}-\dfrac{5}{12}\) )
bài 7 tìm những giá trị nhuyên dương X thỏa mãn
3) \(\dfrac{-5}{11}\)<\(\dfrac{9}{x}\)<\(\dfrac{-5}{12}\)
4) \(\dfrac{-11}{13}\)<\(\dfrac{9}{x}\)<\(\dfrac{-11}{15}\)
5) \(\dfrac{-4}{5}\)<\(\dfrac{9}{x}\)<\(\dfrac{-4}{7}\)
nhanh cần gấp nhé
\(\dfrac{3}{31}\)+\(\left(\dfrac{1}{6}+\dfrac{-5}{9}\right)\):\(\left(\dfrac{7}{24}-\dfrac{13}{18}\right)\)
Bài 1:So Sánh(nhanh nhất)
\(\dfrac{-13}{38}va\dfrac{29}{-88},\dfrac{-18}{31}va\dfrac{-1818}{3131}\)
Bài 2:Tính
a)\(\dfrac{-1}{39}+\dfrac{-1}{52}\)
b)\(\dfrac{-6}{9}+\dfrac{-12}{16}\)
Tính bằng cách hợp lý (nếu có)
a) ${A}= \dfrac{15}{12}+ \dfrac{5}{13}+ \dfrac{-3}{12}+ \dfrac{-18}{13}$
b) ${B}= \dfrac{11}{15} \cdot \dfrac{-19}{13}+ \dfrac{-7}{13} \cdot \dfrac{11}{15}$
c) ${C}=2022^{0}-\Big( \dfrac{1}{7}\Big)^5 \cdot 7^5$
Câu 1: Tìm x, biết:
a)\(x^2-\dfrac{16}{25}=0\) b)\(\dfrac{2}{5}-\left|\dfrac{1}{2}-x\right|=6\)
C2.Tính giá của biểu thức:
a)\(A=1\dfrac{5}{13}-0,25-\left(2\dfrac{5}{9}+\dfrac{18}{13}-\dfrac{1}{4}\right)\)
b)\(\dfrac{\dfrac{3}{5}.7^2-3.5^6+\dfrac{3}{5}.3^9}{\dfrac{3}{4}.7^2-\dfrac{3}{4}.5^7+\dfrac{3}{4}.3^9}\)
\(\dfrac{15}{12}+\dfrac{5}{13}-\dfrac{3}{12}-\dfrac{18}{13}-\dfrac{1}{3}\)
\(14.\dfrac{3}{2}+\dfrac{6}{5}:\left(\dfrac{-2}{5}\right)\)
\(\sqrt{\dfrac{1}{4}+\dfrac{2}{3}-\left(\dfrac{1}{3}\right)^2}\)
