Question

12 Determinati produsele

a)3/5x10/9x 15/2
b)3 1/2x 4/7 x1/4
c) 2 1/3 x 6/7x 1 1/2
d) 5/6 x 3 4/5 x 30 /19
Va rog dau 59 de puncte si coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

$\bf a)~~\dfrac{\not 3}{\not 5}\cdot \dfrac{\not 10}{\not 9}\cdot \dfrac{15}{\not 2} = \dfrac{1}{1}\cdot \dfrac{1}{\not3}\cdot \dfrac{\not15}{1} = \red{\underline{5}}$

$\bf b)~~3\dfrac{1}{2}\cdot \dfrac{\not4}{7}\cdot \dfrac{1}{\not 4} = \dfrac{\not7}{2}\cdot \dfrac{1}{\not7}\cdot \dfrac{1}{1} = \purple{\boxed{\bf \dfrac{1}{2}}}$

$\bf c)~~2\dfrac{1}{3}\cdot \dfrac{6}{7}\cdot 1\dfrac{1}{ 2} = \dfrac{\not7}{\not3}\cdot \dfrac{\not6}{\not7}\cdot \dfrac{\not3}{\not2} = \dfrac{1}{1}\cdot \dfrac{3}{1}\cdot \dfrac{1}{1} = \blue{\underline{3}}$

$\bf d)~~\dfrac{ 5}{6}\cdot3 \dfrac{4}{5}\cdot \dfrac{30}{19} = \dfrac{ \not5}{\not6}\cdot \dfrac{\not19}{\not5}\cdot \dfrac{\not30}{\not19} =\dfrac{1}{1}\cdot \dfrac{1}{1}\cdot \dfrac{5}{1} = \pink{\underline{5}}$

==pav38==