Chương I : Số hữu tỉ. Số thực
Các câu hỏi tương tự
Thực hiện các phép tính sau
Afrac{1}{2}-frac{3}{4}+frac{5}{6}-frac{7}{12}|
B-3-frac{2}{3}+frac{3}{5}left(-frac{10}{9}-frac{25}{3}right)-frac{5}{6}
Cleft(frac{12}{35}-frac{6}{7}+frac{18}{14}right):frac{6}{-7}-frac{-2}{5}-1
Dleft[frac{-54}{64}-left(frac{1}{9}:frac{8}{27}right):frac{-1}{3}right]:frac{-81}{128}
Eleft[frac{193}{-17}left(frac{2}{193}-frac{3}{386}right)+frac{11}{34}right]:left[left(frac{7}{1931}+frac{11}{3862}right)frac{1931}{25}+frac{9}{2}right]
Đọc tiếp
Thực hiện các phép tính sau
\(A=\frac{1}{2}-\frac{3}{4}+\frac{5}{6}-\frac{7}{12}\)|
\(B=-3-\frac{2}{3}+\frac{3}{5}\left(-\frac{10}{9}-\frac{25}{3}\right)-\frac{5}{6}\)
\(C=\left(\frac{12}{35}-\frac{6}{7}+\frac{18}{14}\right):\frac{6}{-7}-\frac{-2}{5}-1\)
\(D=\left[\frac{-54}{64}-\left(\frac{1}{9}:\frac{8}{27}\right):\frac{-1}{3}\right]:\frac{-81}{128}\)
\(E=\left[\frac{193}{-17}\left(\frac{2}{193}-\frac{3}{386}\right)+\frac{11}{34}\right]:\left[\left(\frac{7}{1931}+\frac{11}{3862}\right)\frac{1931}{25}+\frac{9}{2}\right]\)
(\(\frac{2}{5}+\frac{2}{7}-\frac{2}{11}\)):(\(\frac{3}{5}+\frac{3}{7}-\frac{3}{11}\))
Tìm x, biết:
a) \(\frac{x+5}{5}+\frac{x+5}{7}+\frac{x+5}{9}=\frac{x+5}{11}+\frac{x+5}{13}\)
b)\(\frac{x+2}{100}+\frac{x+3}{99}+\frac{x+4}{98}=\frac{x+5}{97}+\frac{x+6}{96}+\frac{x+7}{95}\)
c) (x+2) - (x+3) >0
d)\(\left(x-5\right)\left(x+\frac{7}{3}\right)\ge0\)
A=\(\frac{\left(\frac{3}{10}-\frac{4}{15}-\frac{7}{20}\right).\frac{5}{19}}{\left(\frac{1}{14}+\frac{1}{7}-\frac{-3}{35}\right).\frac{-4}{3}}\)
Tính = cák hợp lý:
a) \(139\frac{5}{7}:\frac{2}{3}-138\frac{2}{7}:\sqrt{\frac{4}{9}}\)
b) \(\left(\frac{-5}{11}:\frac{13}{18}-\frac{5}{11}:\frac{13}{5}\right)+\frac{-1}{33}\)
c) \(\left|97\frac{2}{3}-125\frac{3}{5}\right|+97\frac{2}{5}-125\frac{1}{3}\)
a)frac{-3}{2}-2x+frac{3}{4}-2
b)left(frac{-2}{3}x-frac{3}{5}right)left(frac{3}{-2}-frac{10}{3}right)frac{2}{5}
c)frac{x}{2}-left(frac{3x}{5}-frac{13}{5}right)-left(frac{7}{5}+frac{7}{10}.xright)
d)frac{2x-3}{3}+frac{-3}{2}frac{5-3x}{6}-frac{1}{3}
e)frac{2}{3x}-frac{3}{12}frac{4}{5}-left(frac{7}{x}2right)
k)frac{13}{x-1}+frac{5}{2x-2}-frac{6}{3x-3}
m)left(frac{3}{2}-frac{2}{-5}right):x-frac{1}{2}frac{3}{2}
n)left(frac{3}{2}-frac{5}{11}-frac{3}{13}right)left(2x-2right)left(frac{-3}{4}+frac{5}{22}+...
Đọc tiếp
a)\(\frac{-3}{2}-2x+\frac{3}{4}=-2\)
b)\(\left(\frac{-2}{3}x-\frac{3}{5}\right)\left(\frac{3}{-2}-\frac{10}{3}\right)=\frac{2}{5}\)
c)\(\frac{x}{2}-\left(\frac{3x}{5}-\frac{13}{5}\right)=-\left(\frac{7}{5}+\frac{7}{10}.x\right)\)
d)\(\frac{2x-3}{3}+\frac{-3}{2}=\frac{5-3x}{6}-\frac{1}{3}\)
e)\(\frac{2}{3x}-\frac{3}{12}=\frac{4}{5}-\left(\frac{7}{x}2\right)\)
k)\(\frac{13}{x-1}+\frac{5}{2x-2}-\frac{6}{3x-3}\)
m)\(\left(\frac{3}{2}-\frac{2}{-5}\right):x-\frac{1}{2}=\frac{3}{2}\)
n)\(\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right)\left(2x-2\right)=\left(\frac{-3}{4}+\frac{5}{22}+\frac{3}{26}\right)\)
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Tính bằng cách hợp lí
frac{3}{4}:frac{22}{9}-left|-3x+frac{8}{3}right|frac{3}{4}
frac{2cdot6^9-2^5cdot18^4}{2^2cdot6^8}
139frac{5}{7}:frac{2}{3}-138frac{2}{7}:sqrt{frac{4}{9}}
left(-frac{5}{11}:frac{13}{8}-frac{5}{11}:frac{13}{5}right)+-frac{1}{33}
Đọc tiếp
Giúp mình trả lời bài này với nhé!
Tính bằng cách hợp lí
\(\frac{3}{4}:\frac{22}{9}-\left|-3x+\frac{8}{3}\right|=\frac{3}{4}\)
\(\frac{2\cdot6^9-2^5\cdot18^4}{2^2\cdot6^8}\)
\(139\frac{5}{7}:\frac{2}{3}-138\frac{2}{7}:\sqrt{\frac{4}{9}}\)
\(\left(-\frac{5}{11}:\frac{13}{8}-\frac{5}{11}:\frac{13}{5}\right)+-\frac{1}{33}\)
Afrac{frac{1}{3}-frac{5}{2}}{frac{3}{4}-frac{1}{2}}.frac{frac{5}{6}+frac{7}{3}}{1-frac{5}{6}}.frac{-frac{2}{5}+1}{frac{2}{5}+1}
Bfrac{frac{1}{3}-frac{4}{5}}{frac{1}{3}-frac{4}{5}}.frac{frac{3}{4}-frac{5}{3}}{frac{3}{4}+frac{5}{3}}:frac{frac{4}{5}-1}{1-frac{2}{3}}
mong mọi người giải giúp em
Đọc tiếp
A=\(\frac{\frac{1}{3}-\frac{5}{2}}{\frac{3}{4}-\frac{1}{2}}\).\(\frac{\frac{5}{6}+\frac{7}{3}}{1-\frac{5}{6}}\).\(\frac{-\frac{2}{5}+1}{\frac{2}{5}+1}\)
B=\(\frac{\frac{1}{3}-\frac{4}{5}}{\frac{1}{3}-\frac{4}{5}}\).\(\frac{\frac{3}{4}-\frac{5}{3}}{\frac{3}{4}+\frac{5}{3}}\):\(\frac{\frac{4}{5}-1}{1-\frac{2}{3}}\)
mong mọi người giải giúp em
bài 2:tìm x giá trị biểu thức
a)2-|^{ }_{ }3x-frac{1}{4}|left|-frac{5}{4}right| f)-2,5:left|frac{3}{4}x+frac{1}{2}right|3
b)5-3.left|5-2xright|-4,5 g)left|2x-5right|left|x1right|
c)frac{3}{2}+frac{3}{4}.left|x-frac{3}{4}right|frac{7}{4}
d)frac{11}{4}+frac{3}{2}left|4x-frac{1}{5}right|frac{7}{2}
e)frac{21}{5}+3:left|frac{x}{4}-frac{2}{3}right|6 h)left|right|2x+1|-3|left|-5right|
Đọc tiếp
bài 2:tìm x giá trị biểu thức
a)2-\(|^{ }_{ }\)3x-\(\frac{1}{4}|\)=\(\left|-\frac{5}{4}\right|\) f)-2,5:\(\left|\frac{3}{4}x+\frac{1}{2}\right|=3\)
b)5-3.\(\left|5-2x\right|\)=-4,5 g)\(\left|2x-5\right|=\left|x=1\right|\)
c)\(\frac{3}{2}+\frac{3}{4}.\left|x-\frac{3}{4}\right|=\frac{7}{4}\)
d)\(\frac{11}{4}+\frac{3}{2}\left|4x-\frac{1}{5}\right|=\frac{7}{2}\)
e)\(\frac{21}{5}+3:\left|\frac{x}{4}-\frac{2}{3}\right|=6\) h)\(\left|\right|2x+1|-3|=\left|-5\right|\)