Question

Calculează produsul extremilor din următoarele proporții:
$\frac{x}{0.(6)} = \frac{21}{y}$
$\frac{x}{42} = \frac{1.(3)}{y}$
$\frac{x}{0.8(3)} = \frac{30}{y}$
$\frac{x}{24} = \frac{1.1(6)}{y}$
Repede,vă rog !♡​

Answer 1

xy=21×0,(6) = 21×6/9 = 21×2/3 = 7×2 = 14

xy=42×13-1/9 = 42×12/9 = 14×12/3 = 14×4 = 56

xy=30×83-8/90 = 30×75/90 = 30×5/6 = 150/6 = 25

xy=24×116-11/90 = 24×105/90 = 24×7/6 = 4×7 = 28