Question

Tính : 

a) 16,88 + 9,76 +3,12 - 5,13

b) \(\frac{11}{19}+\frac{8}{13}+\frac{3}{11}\) 

c) \(\frac{1}{2}\div\frac{1}{4}-\frac{1}{6}\)

Answer 1

a) 24,63

Answer 2

\(a,16,88+9,76+3,12-5,13\)

\(=\left(16,88+3,12\right)+\left(9,76-5,13\right)\)

\(=20+4,63\)

\(=24,63\)

\(b,\frac{19}{11}+\frac{8}{13}+\frac{3}{11}\)

\(=\left(\frac{19}{11}+\frac{3}{11}\right)+\frac{8}{13}\)

\(=2+\frac{8}{13}\)

\(=\frac{34}{13}\)

\(c,\frac{1}{2}\div\frac{1}{4}-\frac{1}{6}\)

\(=2-\frac{1}{6}\)

\(=\frac{11}{6}\)

Answer 3

\(a)\)

\(16,88+9,76+3,12-5,13\)

\(=\left(16,88+3,12\right)+\left(9,76-5,13\right)\)

\(=20+4,63\)

\(=24,63\)

\(b)\)

\(\frac{19}{11}+\frac{8}{13}+\frac{3}{11}\)

\(=\left(\frac{19}{11}+\frac{4}{11}\right)+\frac{8}{13}\)

\(=2+\frac{8}{13}\)

\(=\frac{34}{13}\)

\(c)\)

\(\frac{1}{2}:\frac{1}{4}-\frac{1}{6}\)

\(=2-\frac{1}{6}\)

\(=\frac{11}{6}\)

Answer 4

\(16,88+9,76+3,12-5,13\)

\(=\left(16,88+3,12\right)+\left(9,76-5,13\right)\)

\(=20+4,63\)

\(=24,63\)

\(\frac{19}{11}+\frac{8}{13}+\frac{3}{11}\)

\(=\left(\frac{19}{11}+\frac{3}{11}\right)+\frac{8}{13}\)

\(=2+\frac{8}{13}\)

\(=\frac{26}{13}+\frac{8}{13}\)

\(=\frac{34}{13}\)

\(\frac{1}{2}:\frac{1}{4}-\frac{1}{6}\)

\(=\frac{1}{2}.4-\frac{1}{6}\)

\(=2-\frac{1}{6}\)

\(=\frac{12}{6}-\frac{1}{6}\)

\(=\frac{11}{6}\)

Tham khảo nhé~