KiriKola
Rozwiązane

3.Oblicz:
[tex] \frac{5}{8} \times 4.2 - (0.5) {}^{2} = [/tex]
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Odpowiedź :

Kuba116111

Odpowiedź:

[tex]\frac{5}{8} *4,2-(0,5)^2=\frac{5}{8} *\frac{21}{5} -(\frac{1}{2} )^2=\frac{1}{8} *21-\frac{1}{4} =\frac{21}{8} -\frac{1}{4}=\frac{19}{8} =2\frac{3}{8}[/tex]
5/8x42/10 - 0.25 = 1/4x21/2 - 0,25= 21/8 - 25/100 = 1050/400 - 100/400 = 950/400 = 2 150/400 = 2 3/8