\(x-64=245\)

\(x=245+64\)

\(x=309\)

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Chắc là lên đuợc . Mik ko rõ nhưng bạn lên hỏi nhà truờng cho rõ

36,198 : 15 = 2,4132

137,59 : 12 = 11,46583333

\(\dfrac{-5}{8}+\dfrac{7}{8}=\dfrac{2}{8}=\dfrac{1}{4}\)

\(\dfrac{33}{55}=\dfrac{3}{5}\)

\(\dfrac{333}{555}=\dfrac{3}{5}\)

\(\Rightarrow\dfrac{3}{5}=\dfrac{33}{55}=\dfrac{333}{555}\)

\(\dfrac{4}{9}:\left(x+0,4\right)=\dfrac{2}{3}\)

\(x+0,4=\dfrac{4}{9}:\dfrac{2}{3}=\dfrac{4}{9}.\dfrac{3}{2}=\dfrac{12}{18}=\dfrac{2}{3}\)

\(x=\dfrac{2}{3}-0,4\)

\(x=\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{10}{15}-\dfrac{6}{15}\)

\(x=\dfrac{4}{15}\)

\(-\dfrac{3}{4}-\left(x+\dfrac{1}{2}\right)=1\dfrac{2}{3}\)

\(-\dfrac{3}{4}-\left(x+\dfrac{1}{2}\right)=\dfrac{5}{3}\)

\(x+\dfrac{1}{2}=\left(-\dfrac{3}{4}\right)-\dfrac{5}{3}=\left(-\dfrac{9}{12}\right)-\dfrac{20}{12}=\dfrac{-29}{12}\)

\(x=\dfrac{-29}{12}-\dfrac{1}{2}=\dfrac{-29}{12}-\dfrac{6}{12}\)

\(x=\dfrac{-35}{12}\)

\(\left[x-\dfrac{2}{3}\right]-\dfrac{5}{4}=0\)

\(\left[x-\dfrac{2}{3}\right]=0+\dfrac{5}{4}=\dfrac{5}{4}\)

\(\left\{{}\begin{matrix}x-\dfrac{2}{3}=\dfrac{5}{4}\\x-\dfrac{2}{3}=-\dfrac{5}{4}\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=\dfrac{5}{4}+\dfrac{2}{3}\\x=-\dfrac{5}{4}+\dfrac{2}{3}\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=\dfrac{23}{12}\\x=\dfrac{-7}{12}\end{matrix}\right.\)

Một bao đuợng đuợc số bột mì là

54 : 9 = 6 (kg)

108kg đựng đuợc trong số bao là

108 : 6 = 18 (bao )

Đáp số 18 bao

\(\dfrac{17}{11},\dfrac{18}{11},\dfrac{19}{11}\)