Question

вычислите а)4/45*2/3:5 б)3/8:6+5/32*4 в)5/12:10+7/48*3 г)7/36*4-5/9:2​

Answer 1

а)

$\frac{4}{45} \times \frac{2}{3} \div 5 = \frac{4}{45 } \times \frac{2}{3} \times \frac{1}{5} = \frac{8}{675}$

б)

$\frac{3}{8} \div 6 + \frac{5}{32} \times 4 = \frac{3}{8} \times \frac{1}{6} + \frac{5}{8} = \frac{1}{8} \times \frac{1}{2} + \frac{5}{8} = \frac{1}{16} + \frac{5}{8} = \frac{11}{16} = 0.6875$

в)

$\frac{5}{12} \div 10 + \frac{7}{48} \times 3 = \frac{5}{12} \times \frac{1}{10} + \frac{7}{16} = \frac{1}{12} \times \frac{1}{2} + \frac{7}{16} = \frac{1}{24} + \frac{7}{16} = \frac{23}{48}$

г)

$\frac{7}{36} \times 4 - \frac{5}{9} \div 2 = \frac{7}{9} - \frac{5}{9} \times \frac{1}{2} = \frac{7}{9} - \frac{5}{18} = \frac{1}{2} = 0.5$