Oblicz obwody prostokątów o bokach
a) 15 cm i 2dm
b)35cm i 2 m
c)5mm i 1cm
d)850m i 1km .
a) 2 *15 + 2*20= 30+40=70cmb) 2*35 + 200*2= 70 + 400= 470 cmc) 0.5 + 1 = 1,5 cmd) 850 + 1000= 1850 m
a) 30cm+40=70cm
b) 70+400=470cm
c)1cm + 2cm=3cm
d)2*0,85km+2km= 3,7km
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a) 2 *15 + 2*20= 30+40=70cm
b) 2*35 + 200*2= 70 + 400= 470 cm
c) 0.5 + 1 = 1,5 cm
d) 850 + 1000= 1850 m
a) 30cm+40=70cm
b) 70+400=470cm
c)1cm + 2cm=3cm
d)2*0,85km+2km= 3,7km