Răspuns :
1.18×2=36
P=36+36+36+36
p=72+36+36
P=108+36
P=144
2.20÷4=5cm (latimea)
P=20+5+20+5
P=25+20+5
P=45+5
P=50
Succes
P=36+36+36+36
p=72+36+36
P=108+36
P=144
2.20÷4=5cm (latimea)
P=20+5+20+5
P=25+20+5
P=45+5
P=50
Succes
Salut !
a) 18×2=36
36×4=144 (perimetrul)
b)20:4=5
20×2+5×2=40+10=50 (perimetrul)
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