\(\frac{32}{60}+\frac{2}{3}:3+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{8}{15}+\frac{2}{3}:3+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{8}{15}+\frac{2}{3}.\frac{1}{3}+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{8}{15}+\frac{2}{9}+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{96}{180}+\frac{40}{180}+\frac{90}{180}-\frac{45}{180}\)
\(=\frac{181}{180}\)
\(a,\frac{32}{60}+\frac{2}{3}:3+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{32}{60}+\frac{2}{9}+\frac{1}{2}-\frac{1}{4}\)
\(=\frac{34}{45}+\frac{1}{2}-\frac{1}{4}\)
\(=1\frac{23}{90}-\frac{1}{4}\)
\(=1\frac{1}{180}=\frac{181}{180}\)
\(b,\frac{1}{2}+\frac{7}{3}+\frac{9}{2}-\frac{1}{3}+\frac{4}{9}-1-\frac{5}{9}\)
\(=\frac{17}{6}+\frac{9}{2}-\frac{1}{3}+\frac{4}{9}-1-\frac{5}{9}\)
\(=\frac{22}{3}-\frac{1}{3}+\frac{4}{9}-1-\frac{5}{9}\)
\(=\frac{21}{3}+\frac{4}{9}-1-\frac{5}{9}\)
\(=\frac{67}{9}-1-\frac{5}{9}\)
\(=\frac{58}{9}-\frac{5}{9}\)
\(=\frac{53}{9}\)
Bài này nếu bấm máy tính thì là cách nhanh nhất
cau 2 cho cuoi ko phai la 1-5/9 dau ma la 1,5/9 cac cau a
ko phai la 1- 5/9 dau ma la 1+5/9
mik sai de