Răspuns :
Răspuns:
5x12=5x(9+3)=5x9+5x3=45+15=60
7x25=7x(20+5)=7x20+7x5=140+35=175
8x15=8x(9+6)=8x9+8x6=56+48=104
9x21=9x(15+6)=9x15+9x6=135+36=171
;))
Răspuns:
5x12=5x(9+3)=5x9+5x3=45+15=60
7x25=7x(20+5)=7x20+7x5=140+35=175
8x15=8x(9+6)=8x9+8x6=56+48=104
9x21=9x(15+6)=9x15+9x6=135+36=171
;))