Hej!
e)
Pole w cm²
a = 1 m = 100 cm
b = 9 dm = 90 cm
P = 100 cm * 90 cm = 9000 cm²
Pole w dm²
a = 1 m = 10 dm
b = 9 dm
P = 10 dm * 9 dm = 90 dm²
f)
Pole w cm²
a = 30 cm
b = 4 dm = 40 cm
P = 30 cm * 40 cm = 1200 cm²
Pole w dm²
a = 30 cm = 3 dm
b = 4 dm
P = 3 dm * 4 dm = 12 dm²
Pozdrawiam! - Julka
