5. a) 6x4=24
4x4=16
9x4=36
2x4=8
3x4=12
b) 6x5=30
4x5=20
9x5=45
2x5=10
3x5=15
c)6+5=11
4+5=9
9+5=14
2+5=7
3+5=8
6. Mai intai aflam al doilea factor: 5+3=8
apoi facem produsul: 5x8=40
