\(=\left(\dfrac{1}{12}+\dfrac{11}{12}\right)+\left(\dfrac{1}{5}-\dfrac{6}{5}\right)+\dfrac{1}{71}=1-1+\dfrac{1}{71}=\dfrac{1}{71}\)
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Tìm x, biết:
\(\dfrac{x-9}{11}+\dfrac{x-10}{12}+\dfrac{x-11}{13}=\dfrac{x-12}{14}+\dfrac{x-28}{15}\)
tính: A=\([\dfrac{1\dfrac{11}{31}.4\dfrac{3}{7}-(15-6\dfrac{1}{3}.\dfrac{2}{19})}{4\dfrac{5}{6}+\dfrac{1}{6}(12-5\dfrac{1}{3})}.(-1\dfrac{14}{93})].\dfrac{31}{50}\)
Thực hiện phép tính sau:
a, |-0,75| + dfrac{1}{4}-2dfrac{1}{2}
b, 15.dfrac{1}{5}:left(dfrac{-5}{7}right)-2dfrac{1}{5}.left(dfrac{-7}{5}right)
c, dfrac{5}{17}+dfrac{2}{3}-dfrac{20}{12}+dfrac{7}{9}+dfrac{12}{17}
d, dfrac{5}{15}+dfrac{14}{25}-dfrac{12}{9}+dfrac{2}{7}+dfrac{11}{25}
giúp mk nha mk đang cần gấp
Đọc tiếp
Thực hiện phép tính sau:
a, |-0,75| + \(\dfrac{1}{4}-2\dfrac{1}{2}\)
b, \(15.\dfrac{1}{5}:\left(\dfrac{-5}{7}\right)-2\dfrac{1}{5}.\left(\dfrac{-7}{5}\right)\)
c, \(\dfrac{5}{17}+\dfrac{2}{3}-\dfrac{20}{12}+\dfrac{7}{9}+\dfrac{12}{17}\)
d, \(\dfrac{5}{15}+\dfrac{14}{25}-\dfrac{12}{9}+\dfrac{2}{7}+\dfrac{11}{25}\)
giúp mk nha mk đang cần gấp
\(A=\dfrac{0,375-0,3+\dfrac{3}{11}+\dfrac{3}{12}}{-0,265+0,5-\dfrac{5}{11}-\dfrac{5}{12}}+\dfrac{1,5+1-0,75}{2,5+\dfrac{5}{3}-1,25}\)
tính A=\((\dfrac{1,5+1-0,75}{2,5+\dfrac{5}{3}-1,25}+\dfrac{0,375-0,3+\dfrac{3}{11}+\dfrac{3}{12}}{-0,625+0,5-\dfrac{5}{11}-\dfrac{5}{12}}):\dfrac{1890}{2005}+115\)
Câu 1: Tính
1) \(\dfrac{0,375-0,3+\dfrac{3}{11}+\dfrac{3}{12}}{-0,625+0,5-\dfrac{5}{11}-\dfrac{5}{12}}+\dfrac{1,5+1-0,75}{2,5+\dfrac{5}{3}-1,25}\)
2) \(\dfrac{\dfrac{1}{3}-\dfrac{1}{7}-\dfrac{1}{13}}{\dfrac{2}{3}-\dfrac{2}{7}-\dfrac{2}{13}}.\dfrac{\dfrac{1}{2}-0,25+0,2}{\dfrac{7}{6}-0,875+0,7}+\dfrac{6}{7}\)
tính :
a, \(A=\dfrac{0,75-0,6+\dfrac{3}{7}+\dfrac{3}{13}}{2,75-2,2+\dfrac{11}{7}+\dfrac{11}{13}}\)
b, \(B=\dfrac{2^{12}.13+2^{12}.65}{2^{10}.104}+\dfrac{3^{10}.11+3^{10}.5}{3^9.2^4}\)
thực hiện phép tính:
\(\dfrac{0,375-0,3+\dfrac{3}{11}+\dfrac{3}{12}}{-0,265+0,5-\dfrac{5}{11}-\dfrac{5}{12}}+\dfrac{1,5+1-0.75}{2,5+\dfrac{5}{3}-1,25}\)
So Sánh : \(\dfrac{10^{11}-1}{10^{12}-1}\)và\(\dfrac{10^{10}+1}{10^{11}+1}\)