Răspuns:
2,3dam=2,3·10=23m
15,6hm=15,6·100=1560m
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l=1,6m
P=4l=>P=4·1,6=>P=6,4m
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Ptriunghi=AB+BC+AC=>P=21m+1300cm+0,1hm
1300cm=1300:100=13m
0,1hm=0,1·100=10m
P=21m+13m+10m=>P=44m
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1600cm+220dm+1,2dam=1,6dam+2,2dam+1,2dam=5dam
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L=2,5cm
l=2,5dm=250cm
Pdrept=2(L+l)=>P=2(2,5+250)=>P=2·252,5=>P=505cm
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P=36cm
l=110mm=0,11cm
P=2(L+l)
36=2(L+11)
36:2=L+0,11=>L=18-0,11=>L=17,89cm
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290mm=29cm
2,84dm=2840cm
Ma=(28,7cm+29cm+2840cm)/3
Ma=2897,7:3
Ma=965,9cm
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P=2m+0,5dam+1m+0,01hm+150dm
P=2m+5m+1m+1m+15m=>P=24m
0,5dam=5m
0,01hm=1m
150dm=15m
