Question

Calculați:
a)1 8/9+3 4/15;
b)-7/16+5/24;
c)12/35•(-5/6);
d)11/12:1 7/15

Answer 1

Răspuns:

$a) \frac{232}{45} \\ b) - \frac{11}{48} \\ c) - \frac{2}{7} \\ d) \frac{5}{8}$

Explicație pas cu pas:

$a)1 \ \frac{8}{9} + 3 \ \frac{4}{15} = (1 + 3) + ( \frac{8}{9} + \frac{4}{15} ) = 4 + 1 \ \frac{7}{45} = 5 \ \: \frac{7}{45} = \frac{232}{45} \\ b) - \frac{7}{16} + \frac{5}{24} = \frac{ - 21 + 10}{48} = - \frac{11}{48} \\ c) \frac{12}{35} \times ( - \frac{5}{6} ) = - \frac{12}{35} \times \frac{5}{6} = - \frac{2}{35} \times 5 = - \frac{2}{7} \\ d) \frac{11}{12} \div 1 \ \frac{7}{15} = \frac{11}{12} \div \frac{22}{15} = \frac{11}{12} \times \frac{15}{22} = \frac{1}{4} \times \frac{5}{2} = \frac{5}{8}$