Question

Ajutooor ,dau coroana .Rezolvați ce este încercuit va rog

Answer 1

4/5=8/10=12/15=40/50=400/500

48/36=24/18=12/9=4/3=40/30

35/42=5/7=50/70=10/14=15/21

55/99=5/9=10/18=15/27=50/90=25/45

8b

o jumatate=1/2

deci (1/2) *36=18 (sa, fara fractii ,36:2=18)

(5/6) *42=5*7=35

un sfert=1/4

deci (1/4) din (4/5) =(1/4)*(4/5) =1/5

(1/3) *(9/13)=9/93*13)=(3*3)/(3*13)=3/13

10

50% =50/100=1/2

1/2 din56=56:2=28

75%=75/100=3/4

3/4din 576=3*576:4=3*144=432

25%=25/100=1/4

1/4 din 38,6=38,6:4=19,3:2=9,65

50% din 45% din 540=45% din50% din 540=45%din270=(45/100) din270=

45/10 din27=9/2 din27=9*27/2=9*13,5=121,5

Answer 2

[tex]2.c) ^{9)}\frac{41}{12} =\frac{369}{108} \\ \\ 6. \frac{4}{5}=\frac{8}{10}= \frac{12}{15}= \frac{40}{50} \\ \\ \frac{48}{36} =\frac{8}{6} =\frac{4}{3} =\frac{480}{360} \\ \\\frac{55}{99} =\frac{5}{9} =\frac{10}{18} =\frac{550}{990} \\ \\ \frac{35}{42} =\frac{5}{6} =\frac{10}{12} =\frac{350}{420}[/tex]

$8. \frac{1}{2}din32=32:2=16$

$\frac{5}{6}din 42= \frac{42\cdot5}{6}=35$

 un sfert din 4/5 : $\frac{1}{4}\cdot \frac{4}{5} = \frac{1}{5}$

1/3 din 9/11: $\frac{1}{3}\cdot \frac{9}{11} = \frac{3}{11}$

10.b) 50/100 din 56 ?: $\frac{50}{100}\cdot56= 28%$

c) 75/100 din 576 ?: $\frac{75}{100}\cdot576=432%$

11 b)  25/100 din 38,6 ?: $\frac{25}{100}\cdot\frac{386}{10}=9650:1000=9,65%$

c) 50/100 din 45/100 din 550 ?: $\frac{45}{100}\cdot540=243%$
$\frac{50}{100}\cdot 243=121,5%$