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Alinadfg3r
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Calculati raportul segmentelor [AB] si [CD],stiind ca: a) AB=2dm,CD=0,3m b) AB=13mm,CD=0,04cm c) AB=0,(3) hm,CD=0,(3)km d) AB=1,(3)dam,CD=2,1(3)dam
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Răspuns :

Spidie
AB=2 dm
CD=0,3m= 3 dm
AB/ CD= 2/3

AB=13 mm
CD= 0,04 cm= 0,4 mm
AB/CD= 13/0,4=13÷4/10=13*10/4=32,5

AB=0,(3)hm= 3/9 hm= 1/3 hm=10/3 km
CD= 0,(3)km=3/9km=1/3 km
AB/ CD= 10/3 ÷ 1/3= 10/3*3=30/3=10

AB=1,(3) dam= (13-1)/9 dam =12/9 dam=4/3 dam
CD=2,1(3) dam= (123-21)/90=192/90 dam=32 /15 dam

AB /BC= 4/3 /  32/15 = 4/3 * 15/32= 5/8

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