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a) 0,13 cm²=0,13×100 mm²=13 mm²
b)0,553 a=0,553×100 m²=55,3 m²
c)511 m²=511÷100 a=5,11 a
d)4 ha=4×0,01 km²=0,04 km²
e)113,83 km²=113,83÷0,01 ha=11383 ha
f)960 m×750 m=720000 m²
720000 m²=720000÷10000 ha=72 ha
zad.15
2,54 in×2,54 in=25,4 mm×25,4 mm=645,16 mm²
a)645,16 mm²=6,4516cm²
1 stopa=2 cale
(2×2,54 in)×(2×2,54 in)=5,08 in×5,08 in=50,8 mm×50,8 mm²
=2580,64 mm2
b)2580,64 mm2=1 stopa=25,8064 cm²
a) 0,13cm² = 13 mm²
b) 0,553 ar = 55,3 m²
c) 511m² = 5,11 ar
d) 4ha = 0,04 km²
e) 113,83km² = 11383 ha
f) 960m x 750m = 720000m² = 72 ha
Zad.15
1 cal = 2,54 cm
1 stopa = 12 cali
1cal² = 2,54*2,54cm²=6,4516cm²
1 stopa = 12*2,54 cm = 30,48cm
1 stopa² = 30,48*30,48cm²=929,0304cm²