Răspuns :
1)aflam cati metri a sapat in a doua zi
4x9=36m
2)aflam cati metri au sapat in a treia zi
36+4=40m
40:2=20m
3) aflam lungimea santului sapat
4+36+20=60m
4x9=36m
2)aflam cati metri au sapat in a treia zi
36+4=40m
40:2=20m
3) aflam lungimea santului sapat
4+36+20=60m