Răspuns :
Răspuns:
8•5 = 2•4•5 =2•20=20+20=40
8•3=24
9•2=18
4•3=12
18-12=6
Rezolvarea problemei cea de sus:
8x5=2x4x5=2x20
=20+20=40
8x3=24
Rezolvarea problemei cea de jos:
2x9+4x3=
18 + 12 = 30
Răspuns:
8•5 = 2•4•5 =2•20=20+20=40
8•3=24
9•2=18
4•3=12
18-12=6
8x5=2x4x5=2x20
=20+20=40
8x3=24
2x9+4x3=
18 + 12 = 30