Question

Efectuaza, dupa model:
12*7=(10*7)+(2*7)=70+14=84 (model)
14*5=
16*4=
19*9=
13*6=
34*8=
5*68=
73*3=
28*2=
9*75=

Answer 1

14x5=(10x4)+(4x5)=40+20=60
16x4=(10x6)+(6x4)=60+24=84
19x9=(10x9)+(9x9)=90+81=171
13x6=(10x3)+(3x6)=30+18=48
34x8=(30x4)+(4x8)=120+16=136
5x68=(60x8)+(5x8)=480+40=520
73x3=(70x3)+(3x3)=210+9=219
28x2=(20x8)+(8x2)=160+16=176
9x75=(70x5)+(9x5)=350+45=395