Răspuns:
Explicație pas cu pas:
Voi rezolva DOAR ce se vede clar
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1)
a)
1/2=3/8=(2*3)/8=6⁽²/8⁽²=3/4
b)
2,5=7,5
25/10=75/10=75*10/25*10=750⁽²⁵⁰/250=3
c)
3a=12
a= 12:3=4
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2)
a)
4/5=x/15
x= (15*4)/4
x=20/4
x= 5
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b)
3/1,2=10/x
x= (10*1,2)/3
x=12/3
x=4
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c)
x/1,8= 2/9
x=( 1,8*2)/9
x= 3,6/9
x= 0,4
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d)
2x/35=4/7
14x= 140
x= 140:14
x=10
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3)
a= 10
b=15
10/2=15/3
10*3=15*2
30=30
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4)
3m.......12 zile
4m ......x zile
x=( 3*4)/12
x= 12/12 =1 (o zi )
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5)
K= CONSTANTA
a= 5K
b=7K
c= 11 K
5K+7K+11K=69
23K=69
k=69:23
K=3
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a= 5K=5*3=15 carti
b=7K=7*3=21 carti
c= 11K=11*3= 33 carti
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6)
nu se vede clar
