21​ tấn < 400 yến

\(\frac{2}{5}\) m² > 3 000 \(cm^2\)

\(\frac{7}{12}\) giờ < 40 phút

\(\frac{1}{4}\) km = 250 m

21​ tấn < 400 yến

\(\frac{2}{5}\) m² > 3 000 \(cm^2\)

\(\frac{7}{12}\) giờ < 40 phút

\(\frac{1}{4}\) km = 250 m

a) \(\frac{7}{24}+\frac{13}{6}\) = \(\frac{7}{24}+\frac{12}{24}=\frac{19}{24}\)

b) \(\frac{12}{49}-\frac{1}{7}=\frac{12}{49}-\frac{7}{49}=\frac{5}{49}\)

c) \(\frac{5}{8}\times\frac{24}{25}=\overline{\overline{\overline{}}\frac35}\)

d) \(\frac{38}{21}:\frac{19}{3}=\frac{38}{21}\times\frac{3}{19}=\frac{114}{399}\frac{}{}\)

a) 34 287 b) 557 130 42

\(\times\) 137 13260

65 111

171435 273

205722 10

2228655 10

a) 34 287 b) 557 130 42

\(\times\) 137 13260

65 111

171435 273

205722 10

2228655 10

nnnnn

Có 5 nhân tố: