Proszę o wielką pomoc !

Odpowiedź:
a) [tex]\frac{7}{15}[/tex] × [tex]\frac{12}{7}[/tex] × [tex]\frac{25}{28}[/tex] = [tex]\frac{12}{15}[/tex] × [tex]\frac{25}{28}[/tex] = [tex]\frac{15}{21}[/tex]
b) [tex]\frac{27}{7}[/tex] × (-[tex]\frac{1}{3}[/tex]) = -[tex]\frac{9}{7}[/tex] = -1[tex]\frac{2}{7}[/tex]
c) -[tex]\frac{20}{9}[/tex] × -[tex]\frac{117}{100}[/tex] = [tex]\frac{13}{5}[/tex] = 2[tex]\frac{3}{5}[/tex]
d) ([tex]\frac{14}{5}[/tex])^2 = [tex]\frac{196}{25}[/tex] = 7[tex]\frac{21}{25}[/tex]
Odpowiedź:
a)
7/15 * 1 5/7 * 25/28 = 7/15 * 12/7 * 25/28 = 4/5 * 25/28 = 5/7
b)
3 6/7 * (-1/3) = 27/7 * (-1/3) = -9/7 = -1 2/7
c)
(-2 2/9) * (-1,17) = -20/9 * (-117/100) = 13/5 = 2 3/5
d)
(2 4/5)² = (14/5)² = 196/25 = 7 21/25
Szczegółowe wyjaśnienie: