47*12+43*12+120
12*(47+43)+120
12*90+120
1980+120=2100
=564+129.4+120
=564+516+120
=1080+120
=1200
= 564 + 129 . 4 + 120
= 564 + 516 + 120
= 1080 + 120
= 1200
\(47\times12+43\times3\times4+120\\ =47\times12+43\times12+12\times10\\ =12\times\left(47+43+10\right)\\ =12\times100\\=1200\)