0.48 x 530 + 0.24 x 156 x 2 + 4 x 314 x 0.12
= 254,4 + 37,44 x 2 + 1256 x 0,12
= 254,4 + 74,88 + 150,72
= 329,28 + 150,72
= 480
\(0,48\times530+0,24\times156\times2+4\times314\times0,12\)
`=0,48xx530+(0,24xx2)xx156+(4xx0,12)xx314`
`=0,48xx530+0,48xx156+0,48xx314`
`=0,48xx(530+156+314)`
`=0,48xx1000`
`=480`
b) 0.48 x 530 + 0,24 x 156 x 2 + 4 x 314 x 0,12
=0.48 x530 +(0,24x2)x156+(0,12x4)x314
=0,48x530+0,48x156+0,48x314
=0,48x(530+156+314)
=0,48x1000
=480
9. Tính thuận tiện
b) 0.48 x 530 + 0,24 x 156 x 2 + 4 x 314 x 0,12
= ( 0,48 x 530 ) + ( 0,24 x 156 x 2 ) + ( 4 x 314 x 0,12 )
= 254,4 + ( 37,44 x 2 ) + ( 4 x 37,68 )
= 254,4 + 74,88 + 150,72
= 254,4 + 225,6
= 480.