Question

va rog multtt ce stiti de aici ​

Answer 1

Explicație pas cu pas:

1. a) x=(5•12)/(1/2+1/3)=60/(3/6+2/6)=60/(5/6)=60•6/5=72

b)0,(3)=3/9=1/3

0,3(8)=(38-3)/90=35/90=7/18

1,1(6)=(116-11)/90=105/90=21/18=7/6

×-1=1/3•7/6÷7/18=7/18•18/7=1

2.a) 1/9=5/45

deoarece 1•45=9•5 45=45

b) oricum le vei aseza nu iti va da

3. 14•500000=7000000cm=70km

4.a=prima parte

b= a doua

c= atreia

d= a patra

b=3a/2

c=4b/3=(4•3/2)/3=6/3=2a

d=5c/4=5•2/4=5a/2

a+b+c+d=350

a+3a/2+2a+5a/2=350

3a+8a/2=350

3a+4a=350

7a=350

a=50

b=75

c=100

d=125