va rog ajutatima dau COROANA

la exercitiul 19
a) (+852)x(+25)
=+21.204
b) 15x(+234)
=+ 3.510
d) -850x(+600)
=-520.000
e)+1.085x(+40)
=+4240
f)(-15)x313x(+160)
=-4.695x(+160)
=+431.200