z.1
x - szukana liczba
2,5 % = 0,025
zatem
0,025 x = 1 3/4
0,025 x = 1,75
x = 1,75 : 0,025
x = 70
Odp. Ta liczba , to 70.
=======================
z.2
15 % = 0,15
0,15*x = 0,15*[( 2 + 1/3): (4/3)] = 0,15*[ (7/3) *(3/4)] = 0,15*( 7/4) =
= (15/100)*( 7/4) = ( 3/20)*(7/4) = 21/80 = 0,2625
=============================================
Zad1
2,5% --- 1,75
100% --- x
x=1,75·100%/2,5%=70
Zad2
2¹/₃ : ⁴/₃ = ⁷/₃ · ³/₄ = ⁷/₄ = 1,75
0,15·1,75=0,2625
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z.1
x - szukana liczba
2,5 % = 0,025
zatem
0,025 x = 1 3/4
0,025 x = 1,75
x = 1,75 : 0,025
x = 70
Odp. Ta liczba , to 70.
=======================
z.2
15 % = 0,15
0,15*x = 0,15*[( 2 + 1/3): (4/3)] = 0,15*[ (7/3) *(3/4)] = 0,15*( 7/4) =
= (15/100)*( 7/4) = ( 3/20)*(7/4) = 21/80 = 0,2625
=============================================
Zad1
2,5% --- 1,75
100% --- x
x=1,75·100%/2,5%=70
Zad2
2¹/₃ : ⁴/₃ = ⁷/₃ · ³/₄ = ⁷/₄ = 1,75
0,15·1,75=0,2625