Question

Efectuați calculele
2 întreg 1 pe 4 înmulțit cu (-16/27)
B)-2,5 * (-3/46)
C)1,2 * (5/6) * (+2,1) *(-10/7)​

Answer 1

Răspuns:

$2\frac{1}{4}*\frac{-16}{27}=\frac{2*4+1}{4}*\frac{-16}{27}=\frac{9}{4}*\frac{-16}{27}=\frac{1}{1}*\frac{-4}{3}=\frac{-4}{3}=-1,(3)$

b) $-2,5*\frac{-3}{46}=\frac{-25}{10}*\frac{-3}{46}=\frac{75}{460}=\frac{15}{92}$

c) $1,2 * \frac{5}{6}*2,1*\frac{-10}{7}=\frac{12}{10}*\frac{5}{6}*\frac{21}{10}*\frac{-10}{7}=\frac{2}{2}*\frac{1}{1}*\frac{3}{1}*\frac{-1}{1}=\frac{-6}{2}=-3$