Question

Calculeaza: ....


Ajutooor, dau coroana si puncte!!!

E urgent!

Answer 1

$a)0.(4) \times \frac{1}{2} \times 2 \frac{1}{4}$

$= \frac{4}{9} \times \frac{1}{2} \times \frac{2 \times 4 + 1}{4}$

$= \frac{4}{9} \times \frac{1}{2} \times \frac{8 + 1}{4}$

$= \frac{4}{9} \times \frac{1}{2} \times \frac{9}{4}$

$= \frac{1}{2}$

$b)5 \times \frac{2}{3} \times 0.2$

$= \frac{5 \times 2}{3} \times \frac{2}{10}$

$= \frac{10}{3} \times \frac{2}{10}$

$= \frac{2}{3}$

$c)0.(3) \times 0.4 \times 25$

$= \frac{3}{9} \times \frac{4}{10} \times 25$

$= \frac{1}{3} \times \frac{2}{5} \times 25$

$= \frac{1 \times 2 \times 25}{3 \times 5}$

$= \frac{50}{15}$

$= \frac{10}{3}$

$d)2 \times 0.5 \times 0.1(6) \times 6$

$= 1 \times \frac{16 - 1}{90} \times 6$

$= \frac{15}{90} \times 6$

$= \frac{1}{6} \times 6$

$= \frac{6}{6}$

$= 1$

$e)0.4 \times 0.(3) + 0.4 \times 0.(6)$

$= \frac{4}{10} \times \frac{3}{9} + \frac{4}{10} \times \frac{6}{9}$

$= \frac{4}{10} ( \frac{3}{9} + \frac{6}{9} )$

$= \frac{4}{10} \times \frac{9}{9}$

$= \frac{4}{10} \times 1$

$= \frac{4}{10}$

$= \frac{2}{5}$

Answer 2

=4/9*1/2*5/2=5/9
b) =5*2/3*1/5=2/3
c)=3/9*4/10*25=3intregi si1/3
d)=2*1/2*15/90*6=1
e)=0,4(0,(3)+0,(6))=2/5*9/9=2/5