Răspuns :
64:4=16 m stofă ( intr-un valatuc )
16×5=80 m stofă ( in 5 valatuci )
sau :
4 v ..... 64 m stofă
5 v ..... x m stofă
______________
x=64:4×5=16×5=80 m stofă
64:4=16 m stofă ( intr-un valatuc )
16×5=80 m stofă ( in 5 valatuci )
sau :
4 v ..... 64 m stofă
5 v ..... x m stofă
______________
x=64:4×5=16×5=80 m stofă