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1. Vypočítaj aký je priemerný vek štyroch detí, ak Ján má 16 rokov, Katka 14 rokov, Anna 13 rokov a Jozef 5 rokov ?
Ján................16 rokov
Katka............14 rokov
Anna.............13 rokov
Jozef...............5 rokov
16+14+13+5 = 48 48/4 = 12
Priemerný vek štyroch detí je 12 rokov.
2. Vypočítaj obvod a obsah štvorca so stranou a =4,5 m .
a = 4,5 cm
S = ? cm²
O = ? cm
S = a² O = 4a
S = (4,5)² O = 4*4,5
S = 20,25 cm² O = 18 cm
Obvod štvorca je 18 cm a obsah štvorca je 20,25 cm².
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