12000 - ( 1500.2 + 1800.3 + 1800.2 : 3 )
= 12000 - ( 1500.2 + 1800.3 + 3600 : 3 )
= 12000 - ( 3000 + 1800.3 + 3600 : 3 )
= 12000 - ( 3000 + 5400 + 3600 : 3)
= 12000 - ( 8400 + 3600 : 3 )
= 12000 - ( 8400 + 1200 )
= 12000 - 9600
= 2400
12000 - (3000+3600+1200)
=12000 -7800
=4200
12000-(1500.2+1800.3+1800.2:3)
=12000-(3000+5400+1200)
=12000-9600=2400
\(12000-\left(1500.2+1800.3+1800.2:3\right)\)
\(=12000-\left(1500.2+1800+1800.2\right)\)
\(=12000-\left[2\left(1500+1800\right)+1800\right]\)
\(=12000-\left[2.3300+1800\right]\)
\(=12000-6600-1800\)
\(=3600\)
12000 - ( 1500 . 2 + 1800 . 3 + 1800 . 2 : 3 )
= 12000 - ( 3000 + 3600 + 1200 )
= 12000 - 7800
= 4200
