a/ = 17,58 x ( 43 + 57 )
= 17,58 x 100
=1758
a) 17.58 x 43 + 57 x 17.58
= 17.58 x ( 43 + 57 )
= 17.58 x 100
= 1758
a) 17,58 x 43 + 57 x 17,58
= 17,58 x ( 43 + 57 )
= 17,58 x 100
=17,58
b) 43,57 x 2,6 x ( 630 - 315 x 2 )
= 43,57 x 2,6 x ( 630 - 630 )
= 43,57 x 2,6 x 0
= 0
c) \(\frac{45\times16-17}{45\times15+28}\)
\(=\)\(\frac{45\times\left(15+1\right)-17}{45\times15+28}\)
\(=\)\(\frac{45\times15+45-17}{45\times15+28}\)
\(=\)\(\frac{45\times15+28}{45\times15+28}\)
\(=\)1
