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a, 120/300= 2/5
b, 360/640=9/16
c, 2310/3850=321/385
d,1313/4747=13/47
a) \(\frac{120}{300}=\frac{12}{30}=\frac{2}{5}\)
b) \(\frac{360}{640}=\frac{36}{64}=\frac{6}{9}\)
c) \(\frac{2310}{3850}=\frac{231}{385}=\frac{3}{5}\)
d) \(\frac{1313}{4747}=\frac{13}{47}\)

\(2\dfrac{3}{10};2\dfrac{7}{20};3\dfrac{1}{200};2\dfrac{7}{10}\)
\(=>\dfrac{23}{10};\dfrac{47}{20};\dfrac{601}{200};\dfrac{27}{10}\)
\(=>\dfrac{460}{200};\dfrac{470}{200};\dfrac{601}{200};\dfrac{540}{200}\)
\(=>\dfrac{601}{200}\) là lớn nhất
\(=>3\dfrac{1}{200}\) là lớn nhất

\(2m^313dm^3=2,013m^3\)
\(1m^320dm^3=1,02m^3\)
\(4m^35dm^3=4,005m^3\)
\(3m^317cm^3=3,000017m^3\)

\(a.\)\(1\frac{2}{3}:\frac{2}{3}-\frac{3}{4}\cdot\frac{2}{3}+5\frac{3}{7}\)
\(=\frac{5}{3}:\frac{2}{3}-\frac{3}{4}\cdot\frac{2}{3}+\frac{38}{7}\)
\(=\frac{5}{3}\cdot\frac{3}{2}-\frac{3}{4}\cdot\frac{2}{3}+\frac{38}{7}\)
\(=\frac{5}{2}-\frac{1}{2}+\frac{38}{7}\)
\(=\frac{4}{2}+\frac{38}{7}\)
\(=2+\frac{38}{7}\)
\(=\frac{14}{7}+\frac{38}{7}\)
\(=\frac{52}{7}\)
\(b.1\frac{1}{3}-1\frac{1}{4}:1\frac{1}{2}+2\frac{3}{4}\cdot3\frac{2}{3}\)
\(=\frac{4}{3}-\frac{5}{4}:\frac{3}{2}+\frac{11}{4}\cdot\frac{11}{3}\)
\(=\frac{4}{3}-\frac{5}{4}\cdot\frac{2}{3}+\frac{11}{4}\cdot\frac{11}{3}\)
\(=\frac{4}{3}-\frac{5}{6}+\frac{121}{12}\)
\(=\frac{16}{12}-\frac{10}{12}+\frac{121}{12}\)
\(=\frac{6}{12}+\frac{121}{12}\)
\(=\frac{127}{12}\)
\(c.7\cdot\frac{2}{3}-\frac{2}{5}:\frac{1}{2}-\frac{2}{3}\)
\(=7\cdot\frac{2}{3}-\frac{2}{5}\cdot\frac{2}{1}-\frac{2}{3}\)
\(=7\cdot\frac{2}{3}-\frac{4}{5}-\frac{2}{3}\)
\(=\frac{14}{3}-\frac{4}{5}-\frac{2}{3}\)
\(=\frac{70}{15}-\frac{12}{15}-\frac{10}{15}\)
\(=\frac{58}{15}-\frac{10}{15}\)
\(=\frac{48}{15}=\frac{16}{5}\)
\(\frac{5}{3}:\frac{2}{3}-\frac{3}{4}\cdot\frac{2}{3}+\frac{38}{7}\)
\(\frac{5}{2}-\frac{1}{2}+\frac{38}{7}\)
\(2+\frac{38}{7}\)
\(\frac{52}{7}\)
2310 : 5 = 462
770