5×5÷5×6÷6×7÷7= mấy
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{5}{6}+\frac{7}{9}:\frac{5}{6}-\frac{1}{6}\)
\(=\left(\frac{5}{6}-\frac{1}{6}\right)+\frac{7}{9}.\frac{6}{5}\)
\(=\frac{2}{3}+\frac{14}{15}\)
\(=\frac{10}{15}+\frac{14}{15}=\frac{24}{15}\)
\(\frac{8}{11}.\frac{7}{8}+\frac{8}{11}:\frac{4}{5}\)
\(=\frac{7}{11}+\frac{8}{11}.\frac{5}{4}\)
\(=\frac{7}{11}+\frac{10}{11}\)
\(=\frac{17}{11}\)
\(\frac{5}{6}+\frac{7}{9}:\frac{5}{6}-\frac{1}{6}\) \(\frac{8}{11}x\frac{7}{8}+\frac{8}{11}:\frac{4}{5}\)
\(=\frac{5}{6}+\frac{14}{15}-\frac{1}{6}\) \(=\frac{8}{11}x\frac{7}{8}+\frac{8}{11}x\frac{5}{4}\)
\(=\left(\frac{5}{6}-\frac{1}{6}\right)+\frac{14}{15}\) \(=\frac{8}{11}x\left(\frac{7}{8}+\frac{5}{4}\right)\)
\(=\frac{2}{3}+\frac{14}{15}\) \(=\frac{8}{11}x\frac{17}{8}\)
\(=\frac{8}{5}\) \(=\frac{17}{11}\)
Làm 1,2 câu thôi nhé :(
1)
<=> 4x - 20 - 3x - 21 = 5 + 4
<=> 4x - 3x = 5 + 4 + 20 + 21
<=> x = 50
2)
<=> 20 - 5x + 7x - 14 = -2
<=> 2x = -2 - 20 + 14
<=> 2x = -8
<=> x = -8 : 2
<=> x = -4
Các câu sau tươg tự nha
\(\frac{1}{3}:x-\frac{2}{3}=\frac{5}{6}+\frac{7}{8}\)
\(\frac{1}{3}:x-\frac{2}{3}=\frac{41}{24}\)
\(\frac{1}{3}:x=\frac{19}{8}\)
\(x=\frac{8}{57}\)
\(\frac{2}{5}-x:\frac{3}{5}=\frac{6}{7}\)
\(x:\frac{3}{5}=\frac{-16}{35}\)
\(x=\frac{-48}{175}\)
\(\frac{4}{5}-\frac{26}{m}=\frac{-8}{15}\)
\(\frac{26}{m}=\frac{4}{3}\)
=> 26 x 3 = m x 4
78 = m x 4
m = 19,5
Câu 1 :\(\frac{1}{3}\div x-\frac{2}{3}=\frac{5}{6}+\frac{7}{8}\)
\(\Leftrightarrow\frac{1}{3x}=\frac{5}{6}+\frac{7}{8}+\frac{2}{3}\)
\(\Leftrightarrow\frac{1}{3x}=\frac{4\cdot5}{24}+\frac{7\cdot3}{24}+\frac{2\cdot8}{24}\)
\(\Leftrightarrow\frac{1}{3x}=\frac{20}{24}+\frac{21}{24}+\frac{16}{24}\)
\(\Leftrightarrow\frac{1}{3x}=\frac{57}{24}\)
\(\Leftrightarrow24=57\cdot3x\)
\(\Leftrightarrow24=171x\)
\(\Leftrightarrow x=\frac{24}{171}=\frac{8}{57}\)
Câu 2: \(\frac{2}{5}-x\div\frac{3}{5}=\frac{6}{7}\)
\(\Leftrightarrow\frac{-5x}{3}=\frac{6}{7}-\frac{2}{5}\)
\(\Leftrightarrow\frac{-5x}{3}=\frac{5\cdot6}{35}-\frac{2\cdot7}{35}\)
\(\Leftrightarrow\frac{-5x}{3}=\frac{30}{35}-\frac{14}{35}\)
\(\Leftrightarrow-\frac{5x}{3}=\frac{16}{35}\)
\(\Leftrightarrow-175x=48\)
\(\Leftrightarrow x=-\frac{48}{175}\)
Câu 3: \(\frac{4}{5}-\frac{26}{m}=-\frac{8}{15}\)
\(\Leftrightarrow\frac{26}{m}=\frac{4}{5}-\left(-\frac{8}{15}\right)\)
\(\Leftrightarrow\frac{26}{m}=\frac{4}{5}+\frac{8}{15}\)
\(\Leftrightarrow\frac{26}{m}=\frac{12}{15}+\frac{8}{15}\)
\(\Leftrightarrow\frac{26}{m}=\frac{20}{15}\)
\(\Leftrightarrow20m=26\cdot15=390\)
\(\Leftrightarrow m=\frac{390}{20}=\frac{39}{2}\)
máy tính đâu , lấy ra sài
5×5÷5×6÷6×7÷7=5
Máy tính đó !