Răspuns :
Răspuns:
A) 42x17=(18x15)+(42x17)
=270+714
=984
B)55x25=(45x21)+(55x25)
=945+1375
=2320
C)72x32=(27x35)+(72x32)
=945+2304
=3249
Răspuns:
A) 42x17=(18x15)+(42x17)
=270+714
=984
B)55x25=(45x21)+(55x25)
=945+1375
=2320
C)72x32=(27x35)+(72x32)
=945+2304
=3249