Question

выполните действия номер 1. 1)3 1/9÷2 1/3-2 5/6 2)1 5/7-4 3/13÷1 19/26​

Answer 1

Ответ:

Объяснение:

выполните действия

1)  3 1/9÷2 1/3-2 5/6 =28/9:7/3 - 2 5/6=4/3-17/6=-3/2=-1,5;

2)  1 5/7-4 3/13÷1 19/26​=1 5/7 - 55/13:45/26=12/7-22/9= -46/63.

Answer 2

$\displaystyle\bf\\1)\\\\3\frac{1}{9} :2\frac{1}{3} -2\frac{5}{6} =\frac{28}{9} :\frac{7}{3} -2\frac{5}{6} =\frac{28}{9} \cdot \frac{3}{7} -2\frac{5}{6} =\frac{4}{3}-2\frac{5}{6} =1\frac{1}{3} -2\frac{5}{6} =\\\\\\=\Big(1-2\Big)+\Big(\frac{1}{3}-\frac{5}{6} \Big)=-1+\frac{2-5}{6} =-1-\frac{3}{6} =-1\frac{1}{2} =-1,5\\\\\\2)$

$\displaystyle\bf\\1\frac{5}{7} -4\frac{3}{13} :1\frac{19}{26} =1\frac{5}{7} -\frac{55}{13}:\frac{45}{26} =1\frac{5}{7} -\frac{55}{13}\cdot\frac{26}{45} =1\frac{5}{7} -\frac{11\cdot 2}{9} =\\\\\\=1\frac{5}{7} -\frac{22}{9} =1\frac{5}{7}-2\frac{4}{9} =\Big(1-2\Big)+\Big(\frac{5}{7}-\frac{4}{9} \Big)=-1+\frac{45-28}{63} =\\\\\\=-1+\frac{17}{63} =-\frac{46}{63}$