Question

tính nhanh : 85*42+32*8+5*16

Answer 1

85 x 42 + 32 x 8 + 5 x 16

=85 x 42 + 32 x 8 + 5 x 2 x 8

=85 x 42 + (32+10) x 8

=(85+8) x 42

=93 x 42

=3906

chúc bạn học tốt nha

Answer 2

\(85\times42\)\(+32\times8+5\times16\)

=\(3570+256+80\)

=3906

Answer 3

85 x 42 + 32 x 8 + 5 x 16

= 85 x 42 + 32 x 8 + 5 x 2 x 8

= 85 x 42 + 32 x 8 + 10 x 8

= 85 x 42 + ( 32 + 10 ) x 8

= 85 x 42 + 42 x 8

= ( 85 + 8 ) x 42

= 93 x 42

= 3906.