37 . 7 + 80 . 3 + 43 . 7
=7( 37 + 43 ) + 80 . 3
= 7 . 80 + 80 . 3
= 80( 7 + 3 )
= 80 . 10
= 800
37 x 7 + 80 x 3 + 43 x 7 = 800 nha
k mình đi
37.7+80.3+43.7
=7(37+43)+80.3
=7.80+80.3
=80(7+3)
=80.10
=800
37*7+80*3+43*7
=(43+37)*7+80*3
=80*7+80*3
=80*(7+3)
=80*10
=800