Question

Вычислите удобным способом:
43*64+43*23-87*33
84*53-84*28+16*61-16*36
93*24-27*24+66*76
82*46+82*54+135*18-18*35

Answer 1

43(64+43)-87*33=43*87-87*33=87(43-33)=87*10=870
84(53-28)+16(61-36)=84*25+16*25=25(84-16)=25*68=1700
24(93-27)+66*76=24*66+66*76=66(24+76)=66*100=6600
82(46+54)+18(135-35)=82*100+18*100=100(82+18)=100*100=10000