Răspuns :
a) 15 cm + 3 cm = 18 cm
b) 120 mm + 20 mm= 14 cm
120mm= 12 cm
20mm = 2 cm
12cm + 2cm = 14 cm
c)3 m + 2 dm = 320 cm
3 m = 300cm
2 dm = 20 cm
300+20= 320 cm
b) 120 mm + 20 mm= 14 cm
120mm= 12 cm
20mm = 2 cm
12cm + 2cm = 14 cm
c)3 m + 2 dm = 320 cm
3 m = 300cm
2 dm = 20 cm
300+20= 320 cm