Question

14-13.2:(3 11/21- 2 4/15)

Answer 1

$1)3 frac{11}{21}-2 frac{4}{15}= frac{74}{21}- frac{34}{15} = frac{74*5}{21*5}- frac{34*7}{15*7} = frac{370}{105}- frac{238}{105} = frac{370-238}{105}= frac{132}{105}$

$2)13,2: frac{132}{105} = frac{132}{10} * frac{105}{132}= frac{105}{10}=10,5$

$3)14-10,5=3,5$