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a fost răspuns

transformati in metri:
30 dm
25,654 cm
17,36 km
transformati 265 m in:
cm, km, dm
transformati in centrimetri:
71 m
o,o3 km
12 hm
calculati perimtrul unui dreptunghic ce are dimensiunile(lungime si latime):
b) L= 20 m, l= 30 dm
e) L=14,3 l=90 mm
f) L= 12,5 hm, l=1 km

Răspuns :

30 dm=3 m
25,654cm=25654m
265m=26500cm
        =0,265km
         =2,65hm
p=20x2+30x2=100
P=14,3x2+90x2=208,6
p=12,5x2+1x2=26
BeatriceEverdeen
1) 30 dm= 30:10 m= 3 m 25,654 cm= 25,654:100 m=0,25654 m 17,36 km= 17,36* 1000 m= 17360 m 2) 265 m= 265*100 cm= 26500 cm 265 m= 265:1000 km= 0, 265 km 256 m= 265*10 dm= 2650 dm 3) 71 m= 71*100 cm= 7100 cm 0,03 km= 0,03* 100000 cm= 3000 cm 12hm= 12*10000 cm= 120000 cm 4) L=20 m l=30 dm= 30:10 m= 3 m P= 2( L+l )= 2( 20+3)= 2* 23= 46 m L=14,3 cm l=90 mm= 90:10 cm= 9 cm P= 2( L+l )= 2* 23,3 = 46,6 cm L=12,5 hm l= 1km= 1*10 hm= 10 hm P= 2(L+l)= 2* 22,5= 45 hm

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