Răspuns :
4x9=36kg
36:6=6 kg/parcela
54:6=9
9x4=36
36-20=16
60-12=48
48:6=8 castane/coleg
36:6=6 kg/parcela
54:6=9
9x4=36
36-20=16
60-12=48
48:6=8 castane/coleg