a,134dm2 6cm2+0,0978 m2+3m2 32cm2=.....
b,1va 1/4tan + 2va 2/5 ta=....ta
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a) \(\left(\frac{2}{3}+\frac{1}{5}\right)^2:\left(\frac{2}{5}-\frac{1}{3}\right)\)
\(=\left(\frac{13}{15}^2\right)\cdot15\)
\(=\frac{169\cdot15}{225}\)
\(=\frac{169}{15}\)
b)
\(\left(2\frac{1}{3}-1\frac{3}{5}\right)\cdot\left(2\frac{4}{9}:3\frac{1}{2}\right)^2\)
\(=\left(\frac{7}{3}-\frac{8}{5}\right)\cdot\left(\frac{22}{9}\cdot\frac{7}{2}\right)^2\)
\(=\frac{11\cdot5929}{15\cdot81}\)
\(=53,6781893\)
a) \(2\frac{3}{5}:2\frac{1}{4}+\frac{5}{2}\)
\(=\frac{13}{5}:\frac{9}{4}+\frac{5}{2}\)
\(=\frac{52}{45}+\frac{5}{2}\)
\(=\frac{329}{90}\)
B) \(\frac{16}{6}-2\frac{1}{6}:1\frac{1}{7}\)
\(=\frac{8}{3}-\frac{13}{6}:\frac{8}{7}\)
\(=\frac{8}{3}-\frac{91}{48}\)
\(=\frac{37}{48}\)
c) \(4\frac{1}{2}+\frac{1}{2}:5\frac{1}{2}\)
\(=\frac{9}{2}+\frac{1}{2}:\frac{11}{2}\)
\(=\frac{9}{2}+\frac{1}{11}\)
\(=\frac{101}{22}\)
18cm2 + 26cm2 = 44 cm2
40cm2 – 17cm2 = 23cm2
6cm2 x 4cm2 = 24cm2
32cm2 : 4cm2 = 8cm2
9kg 349g = 9,349kg
3m2 7m2 = 10m2
5m2 2cm2 = 5,0002 m2
5 tạ 4 kg = 0,504 tấn
9 kg 349 g = 0,349 kg
3 m2 7 m2 = 10 m2
5 m2 2 cm2 = 5,0002 m2
5 tạ 4 kg = 0,504 tấn