Израз със смесени дроби

[tania]

4[tex]\frac{3}{8}[/tex] -( 3[tex]\frac{5}{7}[/tex] - 1[tex]\frac{5}{7}[/tex] ) + 1[tex]\frac{5}{8}[/tex] =

[Davids]

4[tex]\frac{3}{8}[/tex] -( 3[tex]\frac{5}{7}[/tex] - 1[tex]\frac{5}{7}[/tex] ) + 1[tex]\frac{5}{8}[/tex] =

$= \frac{35}{8} + \frac{13}{8} - (\frac{26}{7} - \frac{12}{7}) = \frac{48}{8} - \frac{14}{7} = 6 - 2 = 4$

[ева]

2 начин
4[tex]\frac{3}{8}[/tex]-(3[tex]\frac{5}{7}[/tex]-1[tex]\frac{5}{7}[/tex])+1[tex]\frac{5}{8}[/tex]=

=4+[tex]\frac{3}{8}[/tex]-[3+[tex]\frac{5}{7}[/tex]-(1+[tex]\frac{5}{7}[/tex])]+1+[tex]\frac{5}{8}[/tex]=

=4+1+[tex]\frac{3}{8}[/tex]+[tex]\frac{5}{8}[/tex]-(2)=

=5+1-2=
=4