37*4=(30+7)*4 =
=30*4 + 7* 4
=148
28*6=(20+8)*6=
-=20*6 + 8*6
=168
9*25=(20+5)* 9
=20 & * 9+5*9
=225
8*47=(40+7)*8
=40*8+7*8
=376
7*53 +=(50+3)*7
=50 *7 +3*7
=371
234*4=(200+30+4)*4
=200*4+30*4+4*4
=936
187*4=(100+80+7)*4
-=100* & 4 +80*4 +7 *4
=748
2*465=(400+60+5)*2
=400*2+60*2 +5*2
=930
*=ori
Scue de greseli