Question

Вычислите рациональным способом 302^2-68^2 +370*66

Answer 1

$302^2-68^2 +370*66=(302-68)(302+68)+370*66=\=234*370+370*66=300*370=111000$

Answer 2

ой 300*370=111000

Answer 3

1) 302^2 - 68^2 = ( 302 - 68 )*( 302 + 68 ) = 234 * 370 ;
2) 234 * 370 + 370 * 66 = 370 * ( 234 + 66 ) = 370 * 300 = ( 37 * 3 ) * 1000 = 111 * 1000 = 111000