Question

Urgent de rezolvat tot!Dau coroana di 99 de puncte pana mâine la ora 10:30

Answer 1

3.
a) 23 si 5
multiplii comuni: 115, 230 , 345...
b)12 si 16
m.c.: 48 , 96 , 144...
c)60 si 80
m.c.: 240 , 480 , 720...
d)18 si 54
m.c.: 54 , 108 , 162...

4.Nu-mi dau seama

5.
a) 5/12 si 7/16
(5/12)*4= 20/48
(7/16)*3=21/48
=> 20/48 < 21/48 => 5/12 < 7/16
b)5/13 si 7/11
(5/13)*11=55/143
(7/11)*13=93/143
=> 55/143 < 93/143 => 5/13 < 7/11
c) 11/13 si 16/17 
(11/13)*17=187/221
(16/17)*13=208/221
=> 187/221 < 208/221 => 11/13 < 16/17

d)2016/2017 si 2017/2018
(2016/2017)*2018=4068288/4070306
(2017/2018)*2017=4068289/4070306
=>4068288/4070306 < 4068289/4070306 =>2016/2017 < 2017/2018
e) 1/(2^2 *3) si 1/(3*5^2)
1/(2^2*3)= 1/12
1/(3*5^2)=1/75
(1/12)*25=25/300
(1/75)*4=4/300
=> 25/300 > 4/300 => 1/12 > 1/75  900
f)1/(2^3*3^2*5) si 1/(2^2*3*5^2)
1/(2^2*3^2*5)= 1/(4*9*5)=1/(36*5)=1/180
1/(2^2*3*5^2)= 1/(4*3*25)=1/(12*25)=1/300
(1/180)*5=5/900
(1/300)*3=3/900
=> 5/900 >3/900 => 1/180 > 1/300

6.
a) 25% si 1/4
25%= 25/100 ~simplificare prin 25~ = 1/4
=> 25%=1/4
b)13% si 1/5
13%=13/100
=> 13/100 < 20/100 => 13/100 < 1/5
c)68% si 5/6
68%=68/100 ~simpl cu 2~ = 34/50 ~simpl cu 2~ = 17/25
=> 17/25 < 5/6
d)33% si 1/3
33%=33/100
=> 66/300 < 100/300 => 33/100 < 1/3

e) 14% si 1/7
14%=14/100 ~ simpl cu 2~ = 7/50
=> 7/50< 1/7 (nu sunt sigura aici)
f)35% si 25/74
35%=35/100 ~simpl cu 5~ = 7/20
=> 7/20 < 25/74
g)143% si 11/13
143%= 143/100 
=> 143/100 > 11/13
h)110% si 6/5
110%= 110/100 ~simpl prin 10~ =11/10
=> 11/10 < 6/5

7.Fie Laurentiu=L si Matei=M
L=34% din drum => 34/100 din drum
M=19/50
34/100 < 19/50 => Matei a ajuns mai aproape de Botosani

8. Habar n-am, imi pare rau.

9.Fie
pixuri rosii=r
pixuri albastre=a
r=10
a=15
a+b=10+15=25 pixuri in total
prima intrebare=> 10/25 fractia care rep. pixurile rosii din cele totale
daca andrei cumpara 5 r si 10a =>
10+5=15 pixuri rosii acum
15+10=25 pixuri albastre acum
r+a=15+25=40pixuri in total acum
15/40 pixuri rosii din fractia totala acum
10/25 > 15/40

Atat! Sper ca te-am ajutat si imi pare rau ca nu am stiut la 4 si la 8!