Question

Вычислите! а)-7/18 - ( -4 5/12 + 4/9 ). б) 3/16* (-4/15) - 11/12 : 1 5/6

Answer 1

а) 3.58333333333

б) -0.55

Answer 2

$- frac{7}{18} - ( - 4 frac{5}{12} + frac{4}{9} ) = - frac{7}{18} + 4 frac{5}{12} - frac{4}{9} = 4frac{ - 14 + 15 - 16}{36} = 4 frac{ - 15}{36} = 4 - frac{5}{12} = 3 frac{12 - 5}{12} = 3 frac{7}{12}$

$frac{3}{16} times ( - frac{4}{15} ) - frac{11}{12} div 1 frac{5}{6} = - frac{1}{4 times 5} - frac{11}{12} div frac{11}{6} = - frac{1}{20} - frac{11 times 6}{12 times 11} = - frac{1}{20} - frac{1}{2} = - frac{1}{20} - frac{10}{20} = - frac{11}{20} = 0.55$