Question

ex nr.12 va rog dau coroana

Answer 1

14x5= (10x5)+(4x5)= 50+20=70

16x4=(10x4)+(6x4)=40+24=64

19x9= (10x9)+(9x9)=90+81=171

13x6= (10x6)+(3x6)=60+18=78

34x8= (30x8)+(4x8)=240+32=272

5x68= (60x5)+(5x8)=300+40=340

72x3= (70x3)+(2x3)=210+6=216

28x2= (20x2)+(8x2)=40+16=56

9x75= (70x9)+(5x9)=630+45=675